In 1831 Charles Darwin set off in HMS Beagle under the command of Captain Robert Fitzroy on a voyage that would change the world. Tory aristocrat Fitzroy was a staunch Christian who believed in the sanctity of the individual in a world created by God: Darwin the liberal cleric and natural historian went on to develop a theory of evolution that would cast doubt on the truth of the Bible and the descent of man. The friendship forged during their epic expeditions on land and sea turned into bitter enmity as Darwin's theories threatened to destroy everything Fitzroy stood for ...