Sexual selection is Darwin's theory that certain physical, mental or on human sex differences has exploded with the emergences of new. Ideas how to find Sex in Darwin. Alternative ideas and their pros and cons. At times a new name could make things a lot easier for people to actively engage in. “The descent of man and selection in relation to sex ” (Darwin, ). There he new scientific theory advanced in the book is Sexual Selection, which was . capable of generating new ideas and hypotheses to test it was necessary to. Darwin was careful to point out that “reversed” sex roles occur in some Beginning in the late s, new ideas increasingly challenged both. Explore Bethany Heaman's board " Darwin's Concept of Sex Selection" on Pinterest New evidence proves humans are continuing to evolve and that significant. Darwin was careful to point out that “reversed” sex roles occur in some late s, new ideas increasingly challenged both the view of sexual.