To a surprising degree our debt is owed to two men who shared little in common other than inquiring minds and great character. Chester F. Carlson was born first, in Seattle in 1906, and Alan Turing was born in 1912 in Paddington, London.
Each made disproportionate contributions to our lives. Carlson made one of the largest personal fortunes ever earned from an invention, and died at the age of 62 having given it away. Turing, the subject of the The Imitation Game, a film that has been recently released, was persecuted during his life for being gay, and died just short of his 42nd birthday. Read more