The American photographer Peter van Agtmael experienced a life-changing moment, aged 19, when he happened on a copy of Magnum Degrees, a photobook published in 2000 of dramatic images from the previous decade.
“I got an instantaneous education in the beauty, violence, mystery, complexity and simplicity of photography,” he writes in his afterword to Magnum America, a much bigger, more mysterious and complex compendium of photographs spanning nine decades, from postwar 1940s to the present day.
