translation.en: 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.
translation.zh: 反对群体选择的主要论据 一直以来 诚然，鼓励群体合作那是再好不过了 但是一旦有了这么一群合作者 就会被一群“爱搭顺风车的人”所利用 这些人喜欢利用别人努力劳动的成果