Sure enough, the 20th century had to have been the most violent in human history. Two world wars, conflict in Southeast Asia, constant war in the Middle East -- and those were just the ones that America was directly involved in. At the beginning of the 21st century, with Afghanistan, Iraq, Libya, and rumblings of war with Syria, it seems like the world is a pack of rabid dogs about to pounce on a Snausage pinata.
Awww. That's just his way of saying he wants to love you right in half.
The Good News:
Even with wars in Afghanistan and Iraq, the first decade of the 21st century saw the number of annual battle deaths at its lowest ever in history.
Professor Joshua Goldstein put it best: "If the world feels like a more violent place than it actually is, that's because there's more information about wars -- not more wars themselves." Overall, we're in the midst of an unheard of "long peace," as no major powers have clashed since World War II, replacing them with smaller wars that historically would count as skirmishes -- the U.S. lost 3,400 soldiers in Afghanistan, which is terrible, but during the American Civil War, 4,700 troops were killed on one side of one single battle. Here it is in graph form: