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World War II a majority of the most prominent and vocal defenders of the evolutionary position which employs methodological naturalism have been atheists. The prominent atheist and evolutionist  Richard Dawkins claimed that "Darwin made it possible to be an intellectually fulfilled atheist". The  Barna Group found regarding atheism and morality that those who hold to the worldviews of atheism or agnosticism in America were more likely, than theists in America, to look upon the following behaviors as morally acceptable: illegal drug use; excessive drinking; sexual relationships outside of marriage; abortion; cohabitating with someone of opposite sex outside of marriage; obscene language; gambling; pornography and obscene sexual behavior; and engaging in homosexuality/ bisexuality. Furthermore,  per capita atheists and agnostics in America give significantly less to charity than theists even when church giving is not counted for theists.  
Given that atheistic evolutionary thinking has engendered  social darwinism and given that the proponents of atheism have no rational basis for morality in their ideology, the immoral views that atheists often hold and the low per capita giving of American atheists is not unpredictable. Historically, atheistic communism regimes have been the most murderous societies in world history in terms of the numbers of individuals killed.