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The US Constitution

The founding document of American government — its origins, key principles, and why it still matters today.

Origins and Structure

The US Constitution was drafted in Philadelphia in 1787 by 55 delegates who had gathered to fix the failing Articles of Confederation. The result was something far more ambitious: an entirely new framework for government.

The Constitution establishes three branches of government — legislative (Congress), executive (the President), and judicial (the Supreme Court) — each with distinct powers. This separation of powers, combined with a system of checks and balances, was designed to prevent any single branch from accumulating too much authority.

The document has been amended 27 times. The first ten amendments, known as the Bill of Rights, were ratified in 1791 and guarantee fundamental freedoms like speech, religion, and due process.