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🇪🇺AP European History Unit 4 Review

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4.4 18th-Century Society and Demographics

🇪🇺AP European History
Unit 4 Review

4.4 18th-Century Society and Demographics

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025
🇪🇺AP European History
Unit & Topic Study Guides
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From Stagnation to Growth: What Changed in 18th-Century Europe?

In the 17th century, much of Europe was caught in a cycle of war, famine, disease, and stagnant economic conditions. The Thirty Years' War (1618–1648) devastated large parts of the continent, leading to food shortages, displacement, and declining birth rates. Diseases like the bubonic plague, smallpox, and influenza spread rapidly in overcrowded and unsanitary conditions. Agricultural output was low, and most people engaged in subsistence farming.

💡 However, by the 18th century, Europe began to experience dramatic demographic and social change. This transformation was driven by advancements in agriculture, medicine, and industry that increased life expectancy, reduced child mortality, and stimulated urbanization.

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Demographic Boom: Population Growth in the 18th Century

A combination of increased food supply, declining death rates, and improved public health led to rapid population growth.

  • Decline in Mortality: The plague virtually disappeared from Western Europe after the 17th century, and the introduction of inoculation—especially against smallpox—helped reduce mortality.
    • Lady Mary Wortley Montagu brought Ottoman inoculation techniques to Britain, which helped pave the way for broader immunization efforts.
  • Better Nutrition: The introduction of New World crops like the potato and maize improved nutrition, especially for the poor. Potatoes, in particular, offered a high-calorie, easy-to-grow crop that sustained larger populations.
  • Improved Sanitation & Housing: Slowly but steadily, European cities began to implement better sewage systems and water access, which decreased the spread of disease.

By 1800, Europe’s population had grown significantly, especially in countries like England and France, fueling labor supply and market demand.

The Agricultural Revolution: A Foundation for Change

The Agricultural Revolution was a key turning point that increased food production, reduced famine, and made population growth sustainable. It began in Britain and gradually spread to the rest of Europe.

Key Innovations:

  • Seed Drill (Jethro Tull): Allowed for efficient planting in rows, increasing crop yields.
  • Crop Rotation: Replacing the medieval three-field system, new techniques like the four-field system rotated crops such as clover and turnips to rejuvenate soil.
  • Selective Breeding: Breeders began improving livestock for meat, milk, and wool production.

Enclosure Movement:

  • The Enclosure Acts in England privatized common lands, consolidating small farms into large, efficient estates.
    • While it boosted productivity, enclosure displaced many peasants, pushing them toward cities in search of work.

💡 The Agricultural Revolution not only supported a growing population, but also freed up labor for industry, laying the groundwork for the Industrial Revolution.

Urbanization and Industrialization

As rural workers were displaced by enclosure and agricultural machines, they migrated to cities where new opportunities emerged in manufacturing.

  • Factory System: Innovations like the steam engine (James Watt) and spinning jenny replaced hand labor with machines, creating factory jobs that drew workers into cities.
  • Textile Production: The textile industry became the first major industrial sector, especially in Britain, employing large numbers of women and children under harsh conditions.

Image Courtesy of Bizim kiez

Demographic Effects of Urbanization:

  • Higher Birth Rates in Cities: Even as urban death rates remained high due to poor sanitation, overall birth rates increased, especially among the working poor.
  • Lower Infant Mortality: Better nutrition and rudimentary medical practices (like midwifery) helped more children survive infancy.
  • ==Changing Family Structure: The nuclear family became more common, especially in the middle and working classes, as urban life and wage labor disrupted extended family living arrangements.==

Social Strain and Responses

The rapid changes of the 18th century strained traditional social structures. Urban overcrowding, rising poverty, and limited infrastructure created new challenges:

  • Poorhouses and Workhouses were established to manage the growing numbers of urban poor.
  • Prostitution and petty crime rose, leading to early forms of police and social surveillance.
  • Enlightenment thinkers, such as Rousseau and Voltaire, began critiquing the inequality and suffering experienced by the lower classes, influencing later revolutionary movements.

Why It Matters:

The demographic and societal shifts of the 18th century were crucial in setting the stage for the modern era:

  • Agricultural productivity supported urban growth and industrial development.
  • Population growth created new consumer markets and labor pools.
  • Improved health and sanitation laid the foundation for longer life expectancy and better public health systems.
  • Urbanization transformed social relationships and labor structures, accelerating the need for reform and, eventually, revolution.

💡 The 18th-century Agricultural and Demographic Revolutions made possible the Industrial Revolution—and in doing so, transformed the trajectory of European civilization.

🎥 Watch: AP European History - New Societal Order in the 1700s

Vocabulary

The following words are mentioned explicitly in the College Board Course and Exam Description for this topic.

TermDefinition
agricultural productivityThe efficiency and output of farming practices, which increased significantly in the 18th century through improved techniques and technology.
Agricultural RevolutionThe 18th-century transformation in farming practices and productivity that increased food supply, reduced famines, and enabled population growth.
birth control methodsPractices used to limit fertility and family size in some 18th-century European areas.
child-rearingThe practices and resources families devoted to raising children, which increased in emphasis and investment during the 18th century.
commercial wealthEconomic prosperity generated through trade and commerce, which increased in the 18th century and allowed families to invest more in children and comfort.
communal valuesTraditional social norms and practices based on community bonds that were eroded by the growth of cities in the 18th century.
crimeIllegal activities that increased in visibility in 18th-century cities and prompted greater policing efforts.
demographic changesShifts in population size, structure, and distribution over time, including changes in birth rates, death rates, and migration patterns.
demographic crisesPeriods of severe disruption to population stability, such as famines or epidemics, that cause mortality spikes and population decline.
European marriage patternA demographic pattern in which Europeans delayed marriage and childbearing in response to economic and environmental challenges, restraining population growth.
food supplyThe availability of food resources to sustain a population, affected by agricultural productivity, transportation, and weather conditions.
illegitimate birthsChildren born outside of marriage, whose rate increased in the 18th century despite the limiting effects of the European marriage pattern.
infant and child mortalityThe death rate of young children, which decreased significantly in the 18th century and influenced family structure and child-rearing practices.
inoculationA medical technique of deliberately exposing a person to a disease agent to build immunity and reduce mortality from that disease.
plagueA devastating epidemic disease that was a major cause of mortality in earlier centuries but declined as a significant threat by the 18th century.
population growthThe increase in the total number of people in a region or society over time.
povertyA social condition of economic deprivation that became increasingly visible and recognized as a problem in growing 18th-century cities.
private lifeThe domestic and personal sphere of family life, which received increased emphasis and resources in 18th-century households.
prostitutionA social problem that became more visible in growing 18th-century cities and prompted increased efforts to police and control it.
rural-to-urban migrationThe movement of people from agricultural countryside areas to cities in search of economic opportunities and employment.
smallpoxA contagious disease whose mortality rates were significantly reduced in the 18th century through inoculation.
transportationThe systems and infrastructure for moving goods, which improved in the 18th century and increased the distribution of food supplies.
urbanizationThe rapid growth of cities and the movement of populations from rural to urban areas as a result of industrial development.

Frequently Asked Questions

What was the Agricultural Revolution and why did it happen in the 18th century?

The Agricultural Revolution was an 18th-century set of changes that greatly raised farm productivity, stabilizing the food supply and enabling steady population growth (CED KC-2.4.I). Key innovations and practices included crop rotation (more efficient use of land), the seed drill and other tools linked to Jethro Tull, selective breeding of livestock, and the Enclosure Movement that consolidated small strips into larger, more productive farms. Improvements in transportation and market integration let surplus food move to growing towns. It happened then because rising commercial demand, capitalist landlords, new scientific approaches to farming, and fewer demographic shocks (like plague) made investment in agrarian innovation profitable and effective. On the AP exam, you should connect these causes to consequences such as rural-urban migration and proto-industrialization (KC-2.4.IV), and you can review this topic on the Fiveable study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9). For extra practice, try the AP practice questions (https://library.fiveable.me/practice/ap-european-history).

Why did people start moving from farms to cities during the 1700s?

People moved from farms to cities in the 1700s mainly because the Agricultural Revolution made farming more productive but needed fewer workers. Innovations like crop rotation, enclosure, selective breeding, and tools (seed drill) raised food output and lowered the demand for labor on small holdings—so many rural workers lost jobs or couldn’t afford land and migrated to towns (CED KC-2.4.I and KC-2.4.IV.A). Cities also offered new work: proto-industrial workshops, trades, and service jobs tied to growing commercial markets. Better transportation and fewer famines plus lower smallpox deaths (inoculation) let populations grow, increasing the labor pool and urban demand (KC-2.4.I.B). Urbanization changed family life, raised awareness of poverty and crime, and pressured city governments (KC-2.4.IV.B–C). This is a common short-answer/LEQ topic—make sure you connect causes (agricultural change, population growth, proto-industrialization) to effects (urban growth, social problems) on the AP exam. For a concise review, see the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practice questions (https://library.fiveable.me/practice/ap-european-history).

What is the European marriage pattern and how did it control population growth?

The European marriage pattern was a demographic system in many parts of northwestern Europe where people typically married later (mid-20s for women, later for men), formed mainly nuclear households, and often practiced long periods of celibacy before marriage. Because a smaller share of women married early and age at first marriage was relatively high, women had fewer childbearing years and therefore fewer children on average. That delayed-marriage norm—plus occasional local birth-control practices and rising illegitimacy in the 18th century—helped limit population growth even as infant mortality fell and food supplies improved (see KC-2.4.III.A in the CED). You’ll often use this concept on short-answer or DBQ/LEQ questions about demographic change (Unit 4); review the topic guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practice questions (https://library.fiveable.me/practice/ap-european-history).

I'm confused about how better farming led to population growth - can someone explain this connection?

Better farming raised the food supply, which let more people survive and reduced famines—that’s the basic link. In the 18th century innovations (crop rotation, Jethro Tull’s seed drill, selective breeding, enclosure) boosted yield per acre and made harvests more reliable. Improved transportation moved that extra food to markets, lowering local shortages (CED KC-2.4.I and KC-2.4.I.A). With fewer periodic famines and lower infant/child mortality (plus smallpox inoculation), population growth became steady rather than crisis-driven (KC-2.4.I.B, KC-2.4.III.B). More food also freed labor for proto-industrial work and pushed rural people to cities (KC-2.4.IV.A), changing urban life and fueling later social changes you might use as causation evidence on SAQs or LEQs. For a focused review, check the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practise questions (https://library.fiveable.me/practice/ap-european-history).

How did Lady Mary Wortley Montagu help with disease prevention?

Lady Mary Wortley Montagu helped prevent disease by introducing and promoting smallpox inoculation (variolation) in Britain. While living in the Ottoman Empire in the 1710s she observed local practitioners deliberately exposing people to small amounts of smallpox to produce a mild infection and immunity. After surviving smallpox herself, she had her own children inoculated when she returned to England (around 1721) and wrote letters and arranged demonstrations to persuade physicians and aristocrats to try the procedure. Her advocacy helped overcome social resistance and spread inoculation among elites, which contributed to reduced smallpox mortality in the 18th century—an important demographic change noted in the CED (inoculation reduced smallpox mortality). This example is useful for AP prompts on public health, population change, or the Scientific Revolution/Enlightenment (see Topic 4.4 study guide for review: https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9). For more practice linking examples like this to exam tasks, check the Unit 4 overview (https://library.fiveable.me/ap-european-history/unit-4) and AP practice problems (https://library.fiveable.me/practice/ap-european-history).

What were the main causes of demographic changes from 1648 to 1815?

From 1648–1815 demographic change was driven by several interconnected causes. First, the Agricultural Revolution (enclosures, crop rotation, seed drill, selective breeding) raised productivity and food supply, reducing famines and enabling steady population growth (CED KC-2.4.I and I.A). Second, better disease control—plague waned and smallpox inoculation spread (e.g., Lady Mary Wortley Montagu)—cut infant and child mortality (KC-2.4.I.B). Third, changing family patterns limited growth: the European marriage pattern (late marriage, household formation) and some birth-control practices slowed rates, even as illegitimacy rose (KC-2.4.III.A). Fourth, economic shifts—proto-industrialization and more efficient agriculture—pushed rural workers into towns, accelerating urbanization and exposing new social problems (KC-2.4.IV and IV.A). Consequences include larger populations, changing family life (more emphasis on childhood), strained city services, and new responses to poverty and crime. For AP prep, you should link these causes to evidence in SAQs/DBQs and use examples from the study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9). For more practice, try Fiveable’s problem sets (https://library.fiveable.me/practice/ap-european-history).

Why did plague disappear as a major disease in the 18th century?

Plague faded as a major epidemic in the 18th century for a mix of biological, social, and public-health reasons. Better nutrition from the Agricultural Revolution improved people’s resistance to disease. European ports and cities adopted stricter quarantine, cordons, and cleaning rules (especially for ships and trade), which cut transmission. Urban reforms—more regular garbage removal, paving, and some sewage improvements—reduced rat and flea habitats that spread Yersinia pestis. Growing medical knowledge and surveillance (not modern antibiotics yet) helped authorities isolate outbreaks faster. Together these changes made large, repeated plague waves far less likely. For AP practice, this fits KC-2.4.I and KC-2.4.I.B (plague decline tied to demographic/agrarian change). You might see it on a short-answer or DBQ as an example of causation/continuity and change—review the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and try practice questions (https://library.fiveable.me/practice/ap-european-history).

What's the difference between how families treated children in the 17th vs 18th centuries?

In the 17th century, high infant and child mortality made many families—especially rural and poor ones—practical and economical about kids: they had lots of children (European marriage pattern limited some births), expected many not to survive, and treated children more as future workers or economic units. By the 18th century, infant mortality fell (smallpox inoculation, plague declined) and agricultural/urban wealth rose, so families invested more in child-rearing: more space, resources, education, and sentimental portraits; intellectuals like Rousseau also promoted childhood as a special stage. You’ll see this change tied to KC-2.4.III.B and KC-2.4.I/B in the CED. Useful for SAQs or LEQs: use evidence about inoculation (Lady Mary Wortley Montagu), rising illegitimacy, and portraiture trends. For a quick topic review check Fiveable’s study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practice questions (https://library.fiveable.me/practice/ap-european-history).

How did Jean-Jacques Rousseau influence ideas about childhood and education?

Rousseau changed how Europeans thought about childhood and education by arguing children are naturally good and learn best through experience. In Emile (1762) he outlined staged, child-centered education—protecting childhood, developing senses and emotions first, then reason—rather than rote memorization or strict discipline. That idea helped shift elite and middle-class parents to invest more time, space, and resources in child-rearing as infant/child mortality fell (CED KC-2.4.III.B). Politically and culturally, his emphasis on emotion, moral development, and natural rights fed broader Enlightenment debates about individual development and schooling—topics that show up on AP short-answer or LEQ prompts about Enlightenment social change. For more AP-aligned review, see the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practice questions (https://library.fiveable.me/practice/ap-european-history).

What were the negative effects of people moving to cities during this time period?

City migration in the 18th century brought jobs but lots of problems. As Agricultural Revolution productivity rose, fewer farmhands were needed, so people moved to cities (rural-urban migration). That caused overcrowded, unsanitary housing and inadequate water and waste systems—which strained city governments and public health even though major plagues declined. Cities concentrated poverty, leading to higher visibility of crime, prostitution, and vagrancy and increased reliance on poorhouses and new police reforms. Traditional communal values broke down, families faced unstable low wages (especially with proto-industrial work), and many lived in cramped tenements with poor nutrition. For AP exam framing, link this to KC-2.4.IV (urbanization’s causes and consequences). For a quick refresher, check the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practice questions (https://library.fiveable.me/practice/ap-european-history).

How do I write a DBQ essay about population growth in 18th century Europe?

Start with a clear thesis that answers the prompt (claim causes of population growth and its consequences) and put it in your intro or conclusion. Briefly contextualize: mention the Agricultural Revolution, decline of plague/smallpox inoculation (Lady Mary Wortley Montagu), and the European marriage pattern (CED keywords). Use at least four documents to support your line of reasoning—group them by cause (e.g., improved agriculture, disease control, changing family practices) and by consequence (urbanization, childrearing changes, strain on city services). For two documents, analyze POV/purpose/situation (who wrote it and why) to show how sources reflect motives or biases. Add at least one specific outside fact (e.g., enclosure, crop rotation, or proto-industrial migration) beyond the documents. Wrap up with a complexity point: show multiple causes interacting (agriculture + medicine + social patterns) and regional differences. For topical review, see the Fiveable Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and try practice DBQs at (https://library.fiveable.me/practice/ap-european-history).

Why did illegitimate births increase in the 1700s if there was better birth control?

Good question. Even though some birth-control methods existed in the 1700s, illegitimate births rose because of social changes, not just contraception. The Agricultural Revolution and urbanization pushed many young people into towns where they left traditional community and church controls that had discouraged premarital sex. The European marriage pattern (late marriage and couples delaying based on household economics) meant more years of single adult life—more chances for premarital relationships. Contraceptives were imperfect, unevenly known, and often unreliable; abortion and infanticide were illegal and risky. Poverty, migration, and growing commercial cities also increased prostitution and informal cohabitation, raising illegitimacy rates. For AP use: link this to KC-2.4.III (Illegitimacy Rise, European marriage pattern, urbanization) when explaining demographic change (good short-answer or LEQ evidence). For a quick review see the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and try practice questions (https://library.fiveable.me/practice/ap-european-history).

What challenges did city governments face when rural people migrated to urban areas?

When rural people moved to cities in the 18th century, city governments faced big strains: overcrowded housing and poor sanitation that spread disease, inadequate water and waste systems, and pressure on food and relief systems (poorhouses). Rapid urban growth eroded traditional communal controls, so authorities struggled to maintain order and public morals—leading to higher visibility of poverty, crime, and prostitution and prompting new policing and poor-relief measures. Economically, cities had to absorb displaced agricultural workers made redundant by the Agricultural Revolution and proto-industrial shifts, increasing unemployment and social instability. These problems show up on the AP exam in short-answer or DBQ prompts about urbanization and social change—use CED terms like Agricultural Revolution, urbanization, poorhouses, and police reforms. For a quick review, check the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and try practice questions (https://library.fiveable.me/practice/ap-european-history).

How did inoculation work and why was it important for population growth?

Inoculation in the 18th century (actually variolation) meant deliberately introducing material from a smallpox sore—usually powdered scabs or pus—into a healthy person’s skin or nose so they’d get a much milder infection and then lifelong immunity. It was risky (some still died and it could spread), but overall it cut smallpox mortality dramatically compared with natural infection. Figures like Lady Mary Wortley Montagu helped spread the practice in Britain. Because smallpox was a major killer of infants and children, inoculation reduced child mortality, raised life expectancy, and helped steady population growth alongside agricultural improvements (CED KC-2.4.I and KC-2.4.I.B). Jenner’s later vaccination (1796) made prevention safer. For more review on Topic 4.4 see the Fiveable study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and practice questions (https://library.fiveable.me/practice/ap-european-history).

I don't understand how agricultural productivity and transportation are connected to demographics - help?

Think of agricultural productivity and transportation as a team that changed how many people could live and where they lived. Higher productivity (enclosures, crop rotation, seed drill, selective breeding) raised the food supply while using fewer workers—so famines became rarer and infant/child mortality fell (CED KC-2.4.I and KC-2.4.III.B). Better roads, canals, and coastal shipping moved that extra food to places that needed it and integrated regional markets, preventing local shortages (KC-2.4.I.A). Together they caused steady population growth and pushed displaced rural workers into towns (proto-industrialization → urbanization, KC-2.4.IV.A). For the AP exam, use this chain (productivity → food supply → lower mortality → population growth → rural-urban migration) as clear causation evidence in SAQs, LEQs, or DBQs about demographic change (Unit 4). For a focused review, check the Topic 4.4 study guide (https://library.fiveable.me/ap-european-history/unit-4/18th-century-society-demographics/study-guide/rjkMnqoJer0rcF0dDea9) and try practice questions (https://library.fiveable.me/practice/ap-european-history).