Without them, there would have been no United States of America. The Founding Fathers, a group of predominantly wealthy plantation owners and businessmen, united 13 disparate colonies, fought for independence from Britain and penned a series of influential governing documents that steer the country to this day.

All the Founding Fathers, including the first four U.S. presidents, at one point considered themselves British subjects. But they revolted against the restrictive rule of King George III—outlining their grievances in the Declaration of Independence, a powerful (albeit incomplete) call for freedom and equality—and won a stunning military victory over what was then the world’s preeminent superpower.

The Founders proved equally adept later on in peacetime. When the federal government tottered under the Articles of Confederation, prominent citizens met anew to hammer out the U.S. Constitution, overcoming major areas of disagreement between large and small states and Southern and Northern ones to form a stable political system. Showing foresight, they included a Bill of Rights, which enshrined many civil liberties into law and provided a blueprint for other emerging democracies.

There’s no official consensus on who should be considered a Founding Father, and some historians object to the term altogether. On the whole, though, it’s applied to those leaders who initiated the Revolutionary War and framed the Constitution. Here are eight of the most influential characters in America’s origin story:

George Washington

Before he fought against the British, George Washington fought for the British, serving as a commander in the French and Indian War. A prosperous Virginia farmer who owned hundreds of slaves, he came to resent the various taxes and restrictions being imposed on the colonies by the British crown.

Once the Revolutionary War broke out in 1775, he was placed in charge of the Continental Army and quickly suffered a near-disastrous defeat at the Battle of Brooklyn. More defeats followed—all in all, Washington lost more battles than he won. Nonetheless, he kept his ragtag troops together even through a freezing winter at Valley Forge and, with the help of his French allies, was able to expel the British by 1783.

Washington then returned to Virginia intent on resuming his career as a farmer. But he was persuaded to re-enter politics as head of the Constitutional Convention in Philadelphia, believing that a stronger federal government was needed to preserve the nation. In 1789, Washington was overwhelmingly elected the first president of the United States. He is aptly known as the “Father of His Country.”

Alexander Hamilton

A poor, illegitimate orphan, Alexander Hamilton emigrated as a teenager from the British West Indies to New York. Rising to prominence as an aide-de-camp to Washington during the Revolutionary War, he became an impassioned supporter of a strong central government.

After attending the Constitutional Convention in 1787, he wrote the majority of the highly persuasive Federalist Papers, which argued for the Constitution’s ratification. Washington then tapped him to serve as the first U.S. treasury secretary, a position he used to push for the creation of a national bank. Later immortalized on the $10 bill, Hamilton was killed in an 1804 duel with his bitter rival Aaron Burr, the sitting vice president.

Benjamin Franklin

Early America’s foremost Renaissance man, Benjamin Franklin was a skilled author, printer, scientist, inventor and diplomat despite a formal education that ended at age 10. When not designing bifocals, harnessing electricity, playing music or publishing Poor Richard’s Almanack, he worked constantly on civic projects to improve his adopted city of Philadelphia.

In the beginning stages of the American Revolution, Franklin was appointed to the five-member committee that drafted the Declaration of Independence. He then traveled to France, where he secured French assistance for the war effort and helped negotiate the 1783 Treaty of Paris, the official end to the conflict. Just prior to his death, Franklin served as a sort of elder statesman at the Constitutional Convention.

John Adams

A distinguished Massachusetts lawyer, John Adams became a relatively early proponent of the revolutionary cause. Just like Franklin, he served on the committee that wrote the Declaration of Independence, journeyed overseas to secure French military aid and helped negotiate the Treaty of Paris. He chaired other key committees as well and even found time to draft the Massachusetts Constitution (which is still in use).

After about 10 years of diplomatic service abroad, Adams returned home in 1788 and subsequently became vice president under Washington. Following Washington’s two terms, he was then elected president, serving from 1797 to 1801. In a striking coincidence, Adams and his friend-turned-rival-turned-friend Thomas Jefferson both died on the same day, July 4, 1826, the 50th anniversary of the Declaration of Independence.

Samuel Adams

The second cousin of John Adams, Samuel Adams was a political firebrand who drummed up immense opposition to British policies in Boston, a hotbed of the resistance. Believing that the colonists were subject to “taxation without representation,” he joined the Sons of Liberty, an underground dissident group that at times resorted to tarring and feathering British loyalists.

Adams likely planned the 1773 Boston Tea Party, and in 1775 his attempted arrest helped spark the Battles of Lexington and Concord, the first skirmish of the Revolutionary War. Unlike many of the Founders, Adams was staunchly anti-slavery. He signed the Declaration of Independence and went on to serve as governor of Massachusetts.

Thomas Jefferson

Well educated and prosperous, Thomas Jefferson was a Virginia lawyer and politician who came to believe the British Parliament held no authority over the 13 colonies. In 1776, he was given the immense task of writing the Declaration of Independence, in which he famously declared that “all men are created equal” and “that they are endowed by their creator with certain unalienable rights,” such as “life, liberty and the pursuit of happiness.” (A lifelong slaveholder, he did not extend these concepts to African-Americans.)

As secretary of state under Washington, Jefferson clashed constantly with Hamilton over foreign policy and the role of government. He later served as vice president to John Adams prior to becoming president, himself, in 1801.

James Madison

A close friend of Jefferson’s, James Madison likewise grew up on a Virginia plantation and served in the state legislature. At the 1787 Constitutional Convention, he proved to be perhaps the most influential delegate, developing a plan to divide the federal government into three branches—legislative, executive and judicial—each with checks on its power. This plan, which was largely adopted, earned him the moniker “Father of the Constitution.”

Madison next co-authored the Federalist Papers and, as a U.S. congressman, became the driving force behind the Bill of Rights. He was elected president in 1808 after serving as Jefferson’s secretary of state.

John Jay

Not nearly as recognized as his major Founder cohorts, John Jay nonetheless played a pivotal role in the creation of the United States. A lawyer, he originally preferred reconciling with Britain rather than fighting for independence. Once war broke out, however, he wholeheartedly joined the side of the colonists, serving, among other roles, as a diplomat to Spain and linking up with Franklin and Adams to negotiate the Treaty of Paris.

Upon returning to the United States, Jay served as secretary of foreign affairs under the Articles of Confederation and authored a few of the Federalist Papers. In 1789, he became the first chief justice of the U.S. Supreme Court, and six years later he was elected governor of New York.

Additional Founders

Many other figures have also been cited as Founding Fathers (or Mothers). These include John Hancock, best known for his flashy signature on the Declaration of Independence; Gouverneur Morris, who wrote much of the Constitution; Thomas Paine, the British-born author of Common Sense; Paul Revere, a Boston silversmith whose “midnight ride” warned of approaching redcoats; George Mason, who helped craft the Constitution but ultimately refused to sign it; Charles Carroll, the lone Catholic to sign the Declaration of Independence; Patrick Henry, who famously declared “Give me liberty, or give me death!”; John Marshall, a Revolutionary War veteran and longtime chief justice of the Supreme Court; and Abigail Adams, who implored her husband, John, to “remember the ladies” while shaping the new country.

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