The idea that sexual selection is just natural selection by the backdoor - that mate choice in nature aims at features that are adaptive for survival - was introduced by Darwin's contemporary critic Alfred Russel Wallace . and later forgotten. https://www.amazon.com/Evolution-Beauty-Darwins-Forgotten-Theory/dp/0385537212/ref=sr_1_1?s=books&ie=UTF8&qid=1494698605&sr=1-1&keywords=darwin+beauty …pic.twitter.com/VNO9WbgpTW