"I guess the bible has been used to justify slavery, but evolutionism has been the justification for far greater atrocities."

evolutionism??? an antiquated term used mainly by creationists and not associated with any organizations to my knowledge.

perhaps you are blending together the more radical proponents of eugenics with "Darwinism". Care to specify just what atrocities you are referring to? Slavery and ethnic cleansing belong to the province of societies and governments, not scientific theories, however valid.

I dare say that Karl Marx never expected his utopian ideal to become the communism of Stalin and Mao. Now there are documented atrocities, except they supported the theory of Lamarck not Darwin.
Or perhaps you think that Huxley was using the notion of natural selection - aka survival of the fittest- to support the British justification of colonialism and their empire, when in fact he was one of the "radicals" seeking democratic reform within the British government.

And if this is some response to my statement that there were those who used the bible to justify slavery and white supremacy - this is historic fact that was a valid consideration for Darwin. His own wife was a devout Christian who constantly prayed for his soul. His original intention was to have his work published at the end of his life and avoid the controversy. Didn't work out that way.