One of Darwin's most contraversial and contested conclusions is that by sexual selection through evolution, male humans are superior to female humans.

We may also infer from the law of the deviation from averages... that the average mental power in man must be above that of women.

There are many other statements like this one in The Descent of Man. Modern feminist and gender theory tends to refute this type of thinking in every way.

You might check out this book, by Antoinette Brown Blackwell: The Sexes Throughout Nature was published four years after Descent and takes Darwin to task for focusing on physical struggle instead of cooperation, and assuming that the Male is the Normal while the Female is the Abnormal.

Most scientists accept Darwinism, and in fact Darwinian thinking is now beginning to revolutionize many of the so-called social sciences, having already won the overwhelming acceptance of biologists, paleontologists, and others in the so-called hard sciences.  A book by Sahotra Sarkar titled Doubting Darwin is one of the latest in a long string of books that discuss (and refute) objections to Darwinism.

The main premise of Charles Darwin's still controversial book, Descent of Man, is that humans are descended from primates through sexual selection. Many people disagree with this idea today because they argue that human beings are much more complex than primates and could not have been created through pure chance.

Here is a link to more information:

http://www.enotes.com/descent-man-salem/descent-man-9560000178