The plagues, several other pandemics, WWI & II, countless countries that have committed genocide, countless deadly civil wars, Taiping rebellion, French Revolut

The plagues, several other pandemics, WWI & II, countless countries that have committed genocide, countless deadly civil wars, Taiping rebellion, French Revolution, Irish Famine, Bengal Famine, Russian Famine, several Indian famines, several Chinese famines, etc.