Now one should think this problem affected people certainly when in predatory societies, they killed animals and they didn't know they had done so after a few generations.
인류의 조상들이 사냥을 하던 시절에는 짐승들을 잡아 먹으며 여러 세대를 걸쳐 그들이 어떤 영향을 미치는지 몰랐을 겁니다.