"When a reserved person once begins to talk, nothing can stop him; and he does not want to have to listen, until he has quite finished his unfamiliar exertion."

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In fact, Darwin's own grandfather anticipated the central tenet of Lamarckism by some seven years: "All animals undergo perpetual transformations; which are in part produced by their own exertions... and many of these acquired forms or propensities are transmitted to their posterity."

— Erasmus Darwin