'A book of big questions, and big answers' Yuval Noah Harari, bestselling author of Sapiens Why has human history unfolded so differently across the globe?'A book of big questions, and big answers' Yuval Noah Harari, bestselling author of Sapiens Why has human history unfolded so differently across the globe? Winner of Rhone Poulenc General Prize for Science Books 1998 and Rhone-Poulenc Science Books Prize 1998.