United States

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NASA marks Earth Day’s 50th anniversary.
“Give Earth a Chance”: Earth Day and the Politics of Modern Environmentalism
Feminist activists demonstrating on London’s Downing Street.
The International History of the U.S. Suffrage Movement
Detail from the Rotunda of the U.S. Capitol.
Common Good and Common Evil in American Religion
This 1878 engraving shows the chaos at the scene of the Boston Massacre
The Boston Massacre
A French Quarter Pontalba Row building.
A Postcard from New Orleans, Louisiana
Sculpture of Donald Trump ripping up the Paris climate agreement.
Dirty Water: Federal Deregulation and the Re-Polluting of America
"Where do we go from here?," a 1920 cartoon depicting the League of Nations Covenant and the Treaty of Versailles
The Versailles Treaty Fight
Inside the National Veteran's Museum and Memorial - The NVMM's exhibits chronicle the stages of a veteran's experience.
The National Veterans Museum and Memorial
A young Paraguayan boy receives a vaccination during the 2014 'Vaccination Week In The Americas.'
Rash Decisions: Anti-vaccination Movements in Historical Perspective
Pedro Albizu Campos, noted anti-imperialist, addressing a crowd in 1936
Reframing the American Empire
In 2014, the debate about the underlying causes of "long, hot summers" remerged with the high-profile police killings of Michael Brown, Tamir Rice, Eric Garner, and others.
Long Hot Summers and Separate Societies
Person holding sign that reads "Stop Voter Suppression"
From Poll Taxes to Partisan Gerrymandering: Voter Disenfranchisement in the United States
Neil Armstrong stands by the Lunar Module "Eagle" during the first walk on the moon in 1969.
Fly Me to the Moon
Illustration of the duel between Alexander Hamilton and Aaron Burr (1887)
The Hamilton-Burr Duel
Elizabeth Cady Stanton with two children
Elizabeth Cady Stanton: Wife, Mother, Revolutionary Thinker
"Gay Liberation" by George Segal
Stonewall and the Unfinished Gay Revolution
Occupy Wall Street and the NAACP protesting in New York in 2011.
A History of Stolen Citizenship
Pullman Strike illustration
Top Ten Origins: American Workers and Strikes
Dr. Martin Luther King, Jr.
The Assassination of Dr. Martin Luther King, Jr.
Crime scene with police tape
White Supremacist Violence – An Origins Top ten
This postcard depicts a recreation of the Arbella, the ship that carried John Winthrop and his fellow Puritans to present-day Massachusetts.
From Forgotten Phrase to American Myth
man with a gun in a holster
Top Ten Origins: Gun Regulation
Chinese laborers work a sugar plantation in 19th century Hawaii.
A Sweet Beginning: the U.S. Sugar Monopoly
The Benevolent and Protective Order of Elks' declaration from Flag Day 1919 that forbade membership in the organization to anarchists, Industrial Workers of the World, Bolsheviks, and other organizations perceived as unpatriotic.
Sanitizing American Tradition