books.google.fr - Biological evolution is a fact--but the many conflicting theories of evolution remain controversial even today. In 1966, simple Darwinism, which holds that evolution functions primarily at the level of the individual organism, was threatened by opposing concepts such as group selection, a popular idea...https://books.google.fr/books/about/Adaptation_and_Natural_Selection.html?hl=fr&id=b924ifrqfosC&utm_source=gb-gplus-shareAdaptation and Natural Selection
