Five chapters follow, each spanning approximately two decades and covering an era in world history and photographic style. The chapters are: Before 1930 (Exploring the power of photography), 1930s-1940s (The Great Depression and World War II), 1950s-1960s (Bright colors and perky smiles), and 1970s-1980s (Back to realism), and 1990s-Present (Everything is relative). Each of these chapters is a portrait of the world.