Adam Smith,

The Theory of Moral Sentiments,

ed. D. D. Raphael and A. L. Macfie (Indianapolis: Liberty Fund, 1982).

Immanuel Kant, quoted in Isaiah Berlin,

The Crooked Timber of Humanity: Chapters in the History of Ideas,

ed. Henry Hardy (London: John Murray, 1990), epigram p. v.

Arthur Koestler, 'The Yogi and the Commissar’,

Horizon,

5.30 (June 1942): 381-92; reprinted in

The Yogi and the Commissar (London: Jonathan Cape, 1945).

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