Original: Despite originally starting out on good terms with Darwin , Owen was highly critical of the Origin in large part because Darwin did not refer much to the previous scientific theories of evolution that had been proposed by people like Chambers and himself , and instead compared the theory of evolution by natural selection with the unscientific theory in the Bible .
Simplified: Owen was highly critical of Darwin 's On the Origin of Species , in part because Darwin did not refer much to the previous scientific theories of evolution . Instead , Darwin compared the theory of evolution by natural selection with the unscientific theory in the Bible .