Photos That Changed the World?

Slate and Magnum Photos team up to present 31 photos that over the past 70 years have "informed the world" and "capture(d) the political and cultural zeitgeist of our time."  The iconic photos in this slide show range from a soldier falling in the Spanish Civil War to a soldier falling in the Iraq War.

In between are photos of James Dean in Times Square, a portrait of Malcolm X, and the beginning of the Tiananmen Square massacre. Only two of the photos show joy - most are portraits of death, destruction and war. (More photography stories.)