What makes a photo change the world?

Robert Capa
© Robert Capa / Magnum Photo

Actually, many photos have been claimed to have changed the world. If you seek a collection of the most famous ones, it depends on wether LIFE or Magnum or some individual assorts them. Interestingly you will find not only pictures of war, agony or politics, but also a variety of luck, delight and fun. See some interpretations of the most influential photos here:

It´s not easy to determine what gives a photo the power to change the world, but often it seems that it´s related to showing the truth and opening up people´s minds – what do you think?