The isms and the phobias. Xenophobia ; Sexism ; Racism ; Nationalism ; Homophobia, biphobia, and transphobia ; Abelism ; Islamophobia ; Antisemitism
The wars. World War II ; The Cold War ; The Korean War and the Vietnam War ; The Israel-Palestine conflict ; 9/11, the War in Afghanistan, and the Iraq War
The movements. Women's suffrage ; The hippie movement ; The Civil Rights movement ; The LGBTQ+ rights movement ; The Arab Spring ; Black Lives Matter ; Me Too ; Immigration, DACA, and dreamers ; March for Our Live ; The climate change movement
The disasters. Oil spills ; Nuclear meltdowns and explosions ; Recessions ; Hurricanes ; Wildfire ; Diseases