Arthur Koestler: ‘Darkness at Noon’ Revolutionary and political ethics ‘Darkness at Noon’ is the second novel of a trilogy, which revolves around the central theme of revolutionary ethics, and of political ethics in general: the problem whether, or to what extent, a noble ends justifies ignoble means, and the related conflict between morality and expediency. The theme of the novel relates to the ever-present predicament faced by the leaders of any political party or revolutionary movement, from the slave revolt in the first century to the Old Bolsheviks of the nineteen thirties. Revolutionary et