Massachusetts abolishes slavery and grants African-American men the right to vote.

A freedom clause in the Massachusetts constitution is interpreted as an abolishment of slavery. Massachusetts enfranchises all men regardless of race.

Delaware makes it illegal to enslave imported Africans.

Pennsylvania begins gradual emancipation.

Great Hurricane of 1780 — the deadliest Atlantic hurricane on record — kills 20,000 to 30,000 in Caribbean.

Los Angeles, California, is founded by 54 settlers, including 26 of African ancestry.

Immanuel Kant publishes Critique of Pure Reason, a fundamental work of modern philosophy.

Britain signs agreement recognizing U.S. independence.

Congress approves Great Seal of U.S. and the eagle as its symbol.

American Revolution Ends Britain and the infant United States sign the Peace of Paris treaty.

Joseph and Jacques Montgolfier make first public balloon flight.

Earthquakes ravage Calabria in Italy, killing 30,000.

John Jay becomes first U.S. Secretary of State.

Russian trappers established a colony on Kodiak Island, Alaska.

Congress narrowly defeats Thomas Jefferson's proposal to ban slavery in new territories after 1800.

Treaty of Paris ratified, officially ending the American Revolutionary War

Congress of the Confederation ratifies the Treaty of Paris on January 14, 1784, formally ending the Revolutionary War.

John Wesley charters Methodist Church.

New York frees all slaves who served in the Revolutionary Army.

First balloon flight across English Channel (Jean-Pierre Blanchard and John Jeffries).

French balloonists Jean-François Pilatre de Rozier and Jules Romain are killed when their Royal Balloon crashes near Boulogne, France, June 15, 1785, in what is considered the first aerial disaster.

Napoleon Bonaparte (16) graduates from the military academy in Paris (42nd in a class of 51).

Frederick the Great, King of Prussia, dies.

Federalist Papers published, calls for ratification of Constitution. The Federalist (later known as The Federalist Papers) is a collection of 85 articles and essays written (under the pseudonym Publius) by Alexander Hamilton, James Madison, and John Jay promoting the ratification of the United States Constitution. Seventy-seven were published serially in the Independent Journal and the New York Packet between October 1787 and August 1788. A compilation of these and eight others, called The Federalist: A Collection of Essays, Written in Favour of the New Constitution, as Agreed upon by the Federal Convention, September 17, 1787, was published in two volumes in 1788 by J. and A. McLean. The collection's original title was The Federalist; the title The Federalist Papers did not emerge until the 20th century. This book should be carefully read by anyone with an interest in American democracy.

Constitutional convention opens at Philadelphia, George Washington presiding.

The Northwest Ordinance bans slavery in the Northwest Territory (what becomes the states of Ohio, Indiana, Illinois, Michigan, and Wisconsin). The ordinance together with state emancipation laws create a free North.

Austrian emperor Jozef II bans children under 8 from labor.

Maryland votes (December 23) to cede a ten-square-mile area for District of Columbia.

New York City becomes first capital of US.

The Massachusetts General Court (legislature), following an incident in which free blacks were kidnapped and transported to the island of Martinique, declares the slave trade illegal and provides monetary damages to victims of kidnappings.

Captain Arthur Phillip forms English colony at Sydney, Botany Bay, New South Wales, Australia.

Kant publishes Critique of Practical Reason.

US Congress passes Federal Judiciary Act, creating a six-person Supreme Court.

Bourbon Whiskey is first created by Elijah Craig in Bourbon, Kentucky.

George Washington becomes the first president of the United States.

Fletcher Christian leads Mutiny on HMS Bounty and Captain William Bligh. Mutineers from the Bounty settle on Pitcairn Island.

Former slave Olaudah Equiano publishes his memoirs, and he travels in Britain lecturing against slavery.

The fall of the Bastille marks the beginning of the French Revolution.