In 1984 Sebastiao Salgado began what would be a fifteen-month project of photographing the drought-stricken Sahel region of Africa in the countries of Chad, Ethiopia, Mali, and Sudan, where approximately one million people died from extreme malnutrition and related causes. Working with the humanitarian organization Doctors Without Borders, Salgado documented the enormous suffering and the great dignity of the refugees. This early work became a template for his future photographic projects about other afflicted people around the world. Since then, Salgado has again and again sought to give...