Herbert Spencer (1820–1903) English philosopher, biologist, sociologist, and prominent classical liberal political theorist
The Development Hypothesis (1852)
Context: Those who cavalierly reject the Theory of Evolution, as not adequately supported by facts, seem quite to forget that their own theory is supported by no facts at all. Like the majority of men who are born to a given belief, they demand the most rigorous proof of any adverse belief, but assume that their own needs none.