John Locke was a 17th-century English Enlightenment philosopher who argued that people are born with natural rights (life, liberty, property) and that government exists by the consent of the governed, ideas that justified the Atlantic revolutions covered in AP World Unit 5.
John Locke is the Enlightenment thinker AP World cares about most, because his ideas became the intellectual fuel for revolution. He argued three big things. First, people are born with natural rights (life, liberty, and property) that no king or church grants them; they just have them. Second, government is a social contract. People agree to be governed in exchange for protection of those rights. Third, and here's the revolutionary part, if a government breaks that contract, the people have the right to overthrow it.
That last idea is why Locke shows up in Topic 5.1. The CED says Enlightenment philosophers "developed new political ideas about the individual, natural rights, and the social contract," and that this thinking "often preceded revolutions and rebellions against existing governments." That's basically a description of Locke's influence. His logic shows up almost word-for-word in the American Declaration of Independence and echoes through the French and Latin American revolutions too. He also gave us tabula rasa, the idea that humans are born as blank slates shaped by experience, which undercut arguments that some people are naturally born to rule.
Locke lives in Unit 5: Revolutions (1750-1900), specifically Topic 5.1 (The Enlightenment). He directly supports learning objective AP World 5.1.A, which asks you to explain the intellectual context behind the Atlantic revolutions. Locke IS a huge chunk of that context. He also feeds into AP World 5.1.B, because reform movements like abolition and expanded suffrage borrowed his natural-rights logic, and AP World 5.10.A, since Enlightenment political ideas kept reshaping governments through the Industrial Age. For the Governance theme, Locke is your go-to evidence whenever a question asks why people in this period suddenly felt entitled to challenge monarchies. Before Locke, kings claimed divine right. After Locke, subjects could argue the king worked for them.
Keep studying AP World Unit 5
Social Contract and Natural Rights (Unit 5)
These two concepts are Locke's signature ideas, and the AP exam treats them as nearly synonymous with his name. If a question mentions "consent of the governed" or rights people are born with, it's pointing at Locke.
American Revolution (Unit 5)
The Declaration of Independence is essentially Locke translated into a breakup letter. "Life, liberty, and the pursuit of happiness" is a remix of Locke's life, liberty, and property, and the colonists' justification for rebellion is his broken-contract argument.
Classical Liberalism and Adam Smith (Unit 5)
Locke's emphasis on individual rights and property became the political half of classical liberalism, while Smith supplied the economic half with free markets. Together they explain the dominant ideology of the Industrial Age in Topic 5.10.
Baron de Montesquieu (Unit 5)
Montesquieu took Locke's worry about government abusing power and gave it a mechanism, separation of powers. Locke says government must protect rights; Montesquieu designs the structure that keeps it honest.
Locke shows up most often in multiple-choice questions, usually attached to a quote or excerpt about natural rights, consent of the governed, or the social contract. Your job is to match the idea to the thinker (Locke, not Hobbes or Rousseau) or to connect his philosophy to a revolution it influenced. Practice questions frequently ask which Enlightenment philosopher shaped the American Revolution with ideas about the social contract and government protecting individual rights; the answer is Locke. He's also useful contextualization evidence on the DBQ and LEQ. If you're writing about the causes of Atlantic revolutions, opening with Enlightenment ideas like Locke's natural rights is a clean way to earn the contextualization point. No released FRQ requires his name verbatim, but he supports almost any Unit 5 argument about why revolutions happened.
Both Hobbes and Locke used social contract theory, which is exactly why the exam loves pairing them. The difference is what they concluded. Hobbes thought humans were naturally violent, so people should surrender their rights to an absolute ruler for safety. Locke thought humans were reasonable, governments existed only to protect natural rights, and people could overthrow a government that failed them. Quick test: if the passage justifies absolute monarchy, it's Hobbes; if it justifies revolution, it's Locke.
John Locke argued that all people are born with natural rights to life, liberty, and property, and that no government can legitimately take them away.
His social contract theory says government exists by the consent of the governed, and people can overthrow a government that violates the contract.
Locke's ideas directly inspired the American Revolution and shaped the broader wave of Atlantic revolutions from 1750 to 1900 (learning objective AP World 5.1.A).
His natural-rights logic was later used by reform movements pushing abolition, expanded suffrage, and women's rights (AP World 5.1.B).
Locke and Hobbes both used the social contract, but Hobbes used it to defend absolute monarchy while Locke used it to justify rebellion.
Locke's political thought became the foundation of classical liberalism, the dominant ideology of the Industrial Age in Topic 5.10.
Locke believed people are born with natural rights (life, liberty, property), that government is a contract between rulers and the people, and that the people can replace a government that breaks the contract. He also proposed tabula rasa, the idea that humans are born as blank slates shaped by experience.
No, that's Hobbes. Locke argued the opposite, that government power comes from the consent of the governed and that people have the right to overthrow rulers who violate their natural rights. Mixing them up is one of the most common Enlightenment mistakes on the exam.
Both used social contract theory, but Locke focused on protecting individual natural rights, while Rousseau emphasized the "general will" of the whole community guiding government. On the exam, individual rights and property signal Locke; collective general will signals Rousseau.
His ideas about natural rights and the social contract were the intellectual spark for the Atlantic revolutions of 1750-1900, which is exactly what learning objective AP World 5.1.A asks you to explain. The American, French, and Latin American revolutions all leaned on his logic.
The Declaration of Independence borrows his framework almost directly. "Life, liberty, and the pursuit of happiness" adapts Locke's natural rights, and the colonists justified independence with his argument that people can dissolve a government that violates the social contract.
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