In his 1995 book Darwin’s Dangerous Idea, Daniel C. Dennett invoked a metaphor that I have found quite helpful. He said that the idea of evolution by natural selection is like a ‘universal acid’, something that cannot be contained in any vessel because it eats through everything. It is so potent and corrosive that once created it cannot be contained or restricted in any way but breaks through all barriers until it reaches into every space. Once you accept the theory of evolution by natural selection as applying in any area of life, there is no way to prevent it being used to explain every aspect of life.
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