On Earth Day, a Chronicle of Precious, Precarious East Africa

For three decades, photographer Guillaume Bonn has traversed East Africa, documenting how civilization’s quintuple threats of modernity, development, population growth, armed conflict, and climate change have imperiled the region’s wildlife, habitats, and human communities. Some of his most distinctive pictures—originally shot on assignment for Vanity Fair—are those depicting camouflage-clad local rangers from game reserves, conservancies, and elsewhere, who risk their lives to combat criminal rings of poachers seeking the valuable horns and tusks of rhinos and elephants. The result is an epic new book, Paradise Inc., published just in time...