english: The main argument against group selection has always been that, well sure, it would be nice to have a group of cooperators, but as soon as you have a group of cooperators, they're just going to get taken over by free-riders, individuals that are going to exploit the hard work of the others.
non_english: Glavni argument protiv grupne selekcije oduvek je bilo da, pa naravno, bilo bi sjajno da imamo grupu saradnika, ali čim imate grupu saradnika, njih će preuzeti slobodni jahači, pojedinci koji će iskoristiti težak rad drugih.