“In fact, Sedgwick did write that "If the book be true, the labours of sober induction are in vain; religion is a lie; human law is a mass of folly, and a base injustice; morality is moonshine; our labours for the black people of Africa were works of madmen; and man and woman are only better beasts!" (letter to Charles Lyell, 9 April 1845, published in The Life and Letters of the Rev. Adam Sedgwick (1890) volume 2, page 84).”

Source: Wikiquote