The change from one stable equilibrium to the other may take place as the result of the isolation of a small unrepresentative group of the population, a temporary change in the environment which alters the relative viability of different types, or in several other ways... (J. B. S. Haldane)

The change from one stable equilibrium to the other may take place as the result of the isolation of a small unrepresentative group of the population, a temporary change in the environment which alters the relative viability of different types, or in several other ways...

J. B. S. Haldane

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change different environment equilibrium group isolation place population relative result several small stable take temporary viability ways

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