Anticipations of the Reaction of Mechanical and Scientific Progress upon Human Life and Thought, generally known as Anticipations, was written by H.G. Wells. He later called the book, which became a bestseller, "the keystone to the main arch of my work." His most recent biographer, however, calls the volume "both the starting point and the lowest point in Wells's career as a social thinker." Taking the revolution in transport facilitated by the "mechanical revolution" as his point of departure, Wells told readers they were living through a reorganization of human society that would alter every dimension of life. An academic biographer has described the degree of accuracy of Wells's predictions as "certainly phenomenal."