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In the early 20th century , other competing ideas of evolution such as mutationism and orthogenesis were refuted as the modern synthesis reconciled Darwinian evolution with classical genetics , which established adaptive evolution as being caused by natural selection acting on Mendelian genetic variation .
 Darwinian, Mendelian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Darwinian, Mendelian