Later, the discovery of Peking man persuaded anthropologists up until the 1930s that Asia was most likely the cradle of the human species.[7] William Boyd Dawkins wrote that the tropical region of Asia was "the probable birthplace of the human race". The British anthropologist Alfred Cort Haddon wrote "There is reason to believe that mankind did not originate in Africa; but that all the main races in that continent reached it from Southern Asia".[8]