Born out of wedlock, raised in the West Indies, and orphaned as a child, Hamilton pursued a college education through the help of local wealthy men. Recognized for his abilities and talent, he was sent to King's College (now Columbia University) in New York City. Hamilton played a major role in the American Revolutionary War. At the start of the war in 1775, he joined a militia company. In early 1776, he raised a provincial artillery company, to which he was appointed captain. He soon became the senior aide to General Washington, the American forces' commander-in-chief. Washington sent him on numerous important missions to tell generals what Washington wanted. After the war, Hamilton was elected to the Congress of the Confederation from New York. He resigned, to practice law, and founded the Bank of New York. Hamilton was among those dissatisfied with the weak national government. He led the Annapolis Convention, which successfully influenced Congress to issue a call for the Philadelphia Convention, in order to create a new constitution. He was an active participant at Philadelphia; and he helped achieve ratification by writing 51 of the 85 installments of The Federalist Papers, which to this day are the single most important reference for Constitutional interpretation.
In 1795, he returned to the practice of law in New York. He tried to control the policies of President Adams (1797–1801). In 1798 and 99, Hamilton called for mobilization against France after the XYZ Affair and became commander of a new army, which he readied for war. However, the Quasi-War, while hard-fought at sea, was never officially declared and did not involve army action. In the end, Adams found a diplomatic solution which avoided a war with France. Hamilton's opposition to Adams' re-election helped cause his defeat in the 1800 election. When Jefferson and Aaron Burr tied for the presidency in the electoral college in 1801, Hamilton helped to defeat Burr, whom he found unprincipled, and to elect Jefferson despite philosophical differences. Hamilton continued his legal and business activities in New York City, but lost much of his national prominence within the Federalist party. When Vice President Burr ran for governor of New York state in 1804, Hamilton crusaded against him as unworthy. Taking offense at some of Hamilton's comments, Burr challenged him to a duel in 1804 and mortally wounded Hamilton, who died the next day.