In forty years, the population of the Earth will reach ten billion. Can our world support so many people? What kind of world will it be? In this unique, original and important book, Charles C. Mann illuminates the four great challenges we face - food, water, energy, climate change - through an exploration of the crucial work and wide-ranging influence of two little-known twentieth-century scientists, Norman Borlaug and William Vogt. Vogt (the Prophet) was the intellectual forefather of the envir...