George Washington was the first president of the United States. He began his first term in 1789. He served for a second term beginning in 1793. Washington played an important role in forming the new nation and encouraged Americans to unite. He also helped define the American presidency. He voluntarily resigned from the presidency after two terms. He set an example for future leaders in his own country and the world by voluntarily giving up power. The tradition of a president serving no more than two terms continued in the United States until Franklin D. Roosevelt, who was elected to office four times (1933–1945). The 22nd Amendment to the Constitution, passed in 1947, now limits presidents to two terms.