To return to Bentham: he advocated, as the basis of morals, 'the greatest happiness of the greatest number'. A man who acts upon this principle will have a much more arduous life than a man who merely obeys conventional precepts. He will necessarily make himself the champion of the oppressed, and so incur the enmity of the great. He will proclaim facts which the powers that be wish to conceal; he will deny falsehoods designed to alienate sympathy from those who need it.
Source: Bertrand Russell: The Harm That Good Men Do，1926.
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