John Adams (October 30, 1735  – July 4, 1826) was an American politician and the second President of the United States (1797–1801), after being the first Vice President (1789–1797) for two terms. He is regarded as one of the most influential Founding Fathers of the United States.

Adams came to prominence in the early stages of the American Revolution. As a delegate from Massachusetts to the Continental Congress, he played a leading role in persuading Congress to adopt the United States Declaration of Independence in 1776. As a representative of Congress in Europe, he was a major negotiator of the eventual peace treaty with Great Britain, and chiefly responsible for obtaining important loans from Amsterdam.

Adams's revolutionary credentials secured him two terms as George Washington's vice president and his own election as the second president of the United States. During his one term as president, he was frustrated by battles inside his own Federalist party against a faction led by Alexander Hamilton, and he signed the controversial Alien and Sedition Acts. The major accomplishment of his presidency was his peaceful resolution of the Quasi-War crisis with France in 1798.