"Opportunism is self interest seeking with guile often involving subtle forms of deceit, especially calculated efforts to mislead, distort, disguise, obfuscate, or otherwise confuse. This vastly complicates the problems of economic organisation. Plainly if it were not for opportunism all behaviour could be rule governed"

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What is the use of this fuss about morality when the issue only involves a horse? The first and most difficult teaching of civilisation concerns man's behaviour to his inferiors. Make humanity gentle or reasonable toward animals, and strife or injustice between human beings would speedily terminate.

— Edward Mayhew