Charles Darwin wrote on the subject female inferiority through the lens of human evolution. He noted in his book The Descent of Men: "young of both sexes resembled the adult female in most species" which he extrapolated and further reasoned "males were more evolutionarily advanced than females". Darwin believed all savages, children and women had smaller brains and therefore led more by instinct and less by reason.[45] Such ideas quickly spread to other scientists such as Professor Carl Vogt of natural sciences at the University of Geneva who argued "the child, the female, and the senile white" had the mental traits of a "grown up Negro", that the female is similar in intellectual capacity and personality traits to both infants and the "lower races" such as blacks while drawing conclusion that women are closely related to lower animals than men and "hence we should discover a greater apelike resemblance if we were to take a female as our standard".[45] Darwin's beliefs about women were also reflective of his attitudes towards women in general for example his views towards marriage as a young man in which he was quoted ""how should I manage all my business if obligated to go everyday walking with my wife – Ehau!" and that being married was "worse than being a Negro".[45] Or in other instances his concern of his son marrying a woman named Martineau about which he wrote "... he shall be not much better than her "nigger." Imagine poor Erasmus a nigger to so philosophical and energetic a lady ... Martineau had just returned from a whirlwind tour of America, and was full of married women's property rights ... Perfect equality of rights is part of her doctrine...We must pray for our poor "nigger.""