James Madison, Jr. (March 16, 1751 – June 28, 1836) was an American statesman, diplomat, expansionist, philosopher and Founding Father who served as the fourth president of the United States from 1809 to 1817. He is hailed as the 'Father of the Constitution' for his pivotal role in drafting and promoting the Constitution of the United States and the United States Bill of Rights. Born into a prominent Virginia planter family, Madison served as a member of the Virginia House of Delegates and the Continental Congress during and after the American Revolutionary War. He became dissatisfied with the weak national government established by the Articles of Confederation and helped organize the Constitutional Convention, which produced a new constitution to supplant the Articles of Confederation.