On July 12th, 1776, Captain James Cook, already lionized as the greatest explorer in British history, set off on his third voyage in HMS Resolution. Two-and-a-half years later, on a beach in Hawaii, Cook was killed - beaten and stabbed in a conflict with the indigenous population. Renowned for his humane leadership, dedication to science and the curiosity and respect, not judgement, with which he greeted societies that were new to him, Cook had already...