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| | Controversy. Catastrophism and Evolution: The Ongoing Debate |
 | | Uniformitarianism was formulated by Charles Lyell in a geological context, but many of its principles and attitudes were adopted by Charles Darwin for his theory of evolution, subsequently developed into the Modern Synthesis. |
 | | Actualistic uniformitarianism, the principle that physical processes operate according to unchanging laws, was widely acclaimed by scientists of all persuasions, then and subsequently. |
 | | Nevertheless, an unnecessary association was established between actualistic and substantive uniformitarianism and, since no global catastrophes had apparently been observed in historical times, uniformitarianism came to imply gradualism, this being stretched to include minor catastrophist elements such as earthquakes and volcanic eruptions. |
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