---
title: "European Commission | European History 1945 to Present"
description: "European Commission is the EU’s executive body, proposing laws, enforcing treaties, and shaping integration in European History 1945 to Present."
canonical: "https://fiveable.me/europe-since-1945/key-terms/european-commission"
type: "key-term"
subject: "European History – 1945 to Present"
unit: "Unit 22"
---

# European Commission | European History 1945 to Present

## Definition

The European Commission is the European Union’s executive branch. In European History 1945 to Present, it is the institution that proposes legislation, enforces EU rules, and manages day-to-day Union policy.

## What It Is

The European Commission is the executive branch of the European Union in this course, the institution that turns European integration from an idea into actual policy. If you are tracing how postwar Europe moved from loose cooperation toward a supranational system, the Commission is one of the main engines of that shift.

It began with the European Economic Community created by the Treaty of Rome in 1957, with the Commission established in 1958. That timing matters because the early European project was not just about trade agreements, it was about building institutions that could keep member states tied to shared rules. The Commission became the body that could propose new laws for the Union, monitor whether states followed them, and push integration forward when governments hesitated.

In practice, the Commission is not a parliament and it does not act like a national cabinet. Its job is more technocratic and supranational. There are 27 Commissioners, one from each member state, but they are supposed to work for the EU as a whole rather than simply defend the interests of their home country. That is one reason historians and political scientists use the Commission as a sign that European integration went beyond ordinary international diplomacy.

The Commission’s powers are easiest to understand when you compare it with the other EU institutions. It has the exclusive right to initiate most EU legislation, but it does not pass laws by itself. After proposing policy, it has to work with the European Parliament and the Council of the European Union, which debate, amend, and approve legislation. That structure reflects a constant tension in post-1945 Europe between national sovereignty and shared governance.

The Commission also enforces EU law. If a member state ignores treaty obligations or breaks agreed rules, the Commission can begin legal action. That enforcement role is a big clue about what the EU became after the war: not just a club of states, but a system with rules, institutions, and consequences.

## Why It Matters

The European Commission helps explain how Europe’s postwar recovery turned into deeper political and economic integration. When you see the EU growing from the Treaty of Rome into a more powerful supranational organization, the Commission is one of the clearest signs of that transformation.

It matters because many course questions are really about power. Who makes policy, who enforces it, and how far member states are willing to give up control are central themes in Europe after 1945. The Commission sits right in the middle of those questions, since it can propose laws, monitor compliance, and push common standards across borders.

It also helps you interpret why the EU is different from a traditional alliance. NATO, for example, is about collective security, while the Commission is part of a governing system that shapes trade, regulation, agriculture, competition, and other areas of daily life. That difference shows how European integration developed into something much deeper than wartime cooperation.

In essays, the Commission is a useful example when you are arguing that post-1945 Europe saw a steady transfer of authority from individual states to shared institutions. In discussions of the EEC, the EU, or the balance between national governments and supranational power, the Commission is one of the best pieces of evidence you can use.

## Connections

### European Union (EU)

The Commission is one of the EU’s main institutions, so you cannot really explain it apart from the larger union. If the question is about European integration after World War II, the EU is the bigger framework and the Commission is one of the mechanisms that makes that framework work. It shows how the Union acts like more than a treaty organization.

### Council of the European Union

The Commission proposes much of the legislation, but the Council of the European Union represents member-state governments in the lawmaking process. That means the two institutions often appear together in questions about how EU decisions get made. A common mistake is to mix them up, but the Commission is more executive and the Council is more intergovernmental.

### [European Parliament](/europe-since-1945/key-terms/european-parliament)

The European Parliament works with the Commission in the legislative process, especially when proposed laws are debated or amended. In course essays, this pairing shows the EU’s mixed system of representation, where citizens and national governments both have a voice. The Commission starts the process, but the Parliament helps shape the outcome.

### [European Court of Justice](/europe-since-1945/key-terms/european-court-of-justice)

The Commission enforces EU treaties partly through legal action, and the European Court of Justice is where disputes over EU law are settled. This connection helps you see the EU as a legal order, not just a political project. If a state resists EU obligations, the Commission can challenge it and the Court can rule on the case.

## On the AP Exam

A quiz question or short essay may ask you to identify what the Commission does in the EU system, or to compare it with the European Parliament or Council. Use it to explain how legislation moves from proposal to approval and enforcement. If you get a document about European integration, look for evidence that the EU had created a body above the level of individual states. If there is a prompt on supranationalism, the Commission is a strong example because it acts for the Union as a whole, not just for one country.

## European Commission vs European Council

The European Commission and the European Council both sit inside the EU, but they do very different things. The Commission is the executive body that proposes and enforces policy, while the European Council brings together heads of state or government to set broad political direction. If you remember only one difference, make it this: the Commission pushes policy forward, and the European Council gives the big-picture leadership.

## Key Takeaways

- The European Commission is the executive branch of the European Union in the post-1945 European integration story.
- It began with the Treaty of Rome era and reflects the move from simple cooperation to supranational institutions.
- Its main powers are proposing legislation, enforcing EU rules, and managing Union policies day to day.
- The Commission works with the European Parliament and the Council of the European Union, so it does not govern alone.
- If you are writing about the EU, the Commission is one of the clearest examples of shared European authority replacing purely national control.

## FAQs

### What is the European Commission in European History 1945 to Present?

The European Commission is the executive branch of the European Union. In this course, it matters because it shows how postwar Europe built institutions that could propose laws, enforce rules, and manage integration across member states. It is one of the clearest signs that the EU became more than a simple international agreement.

### Is the European Commission the same as the European Council?

No. The Commission is the EU’s executive institution, while the European Council sets broad political direction through national leaders. They are both important, but they do different jobs. A lot of students mix them up because they sound similar, so it helps to remember that the Commission proposes and enforces, while the Council leads at the top level.

### Why was the European Commission created after World War II?

It was created as part of the postwar push for European integration, starting with the Treaty of Rome and the European Economic Community. Leaders wanted institutions that could reduce rivalry, expand trade, and keep countries tied to shared rules. The Commission helped turn that idea into a working system.

### How do you use the European Commission in an essay?

Use it as evidence for supranationalism, European integration, or the transfer of authority from nation-states to the EU. It works especially well when you are explaining how the post-1945 European project moved from economic cooperation to deeper political coordination. You can also compare it with bodies that represent member states more directly.

## Related Study Guides

- [22.2 Establishment of the European Union and its institutions](/europe-since-1945/unit-22/establishment-european-union-institutions/study-guide/PbTITZG7Q091QWL5)
- [9.2 The Treaty of Rome and the formation of the EEC](/europe-since-1945/unit-9/treaty-rome-formation-eec/study-guide/PlZYsrRWVo7jrLWL)

## About This Document

Canonical Fiveable pages are available as Markdown at the same path plus `.md`.

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- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
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