"From the moment of birth, at every level, human beings who are more alike than different become polarized into two absolutely exclusive classes with very different and ill-distributed symbolic powers."

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The gravitation constant is the same always. But the economic constants-these elasticities of demand and supply-depending, as they do, upon human consciousness, are liable to vary. The constitution of the atom, as it were, and not merely its position, changes under the influence of environment.

— Arthur Cecil Pigou