https://tw.voicetube.com/everyday/20180413

英文：

While it may seem counterproductive for members of the same species to eat each other, cannibalism can promote the survival of the species as a whole by reducing competition, culling the weak, and bolstering the strong.

雖然對於同種族的成員來說，同類相食看似毫無用意。但那其實可以促進整個種族的存活，畢竟競爭減少了，弱者也被篩選了出來，強者則得到助益。