In "Watership Down," Holly expresses a profound concern about the inherent evil in humanity. He suggests that while other creatures fulfill their roles in nature, humans have a destructive nature that drives them to harm the environment and other living beings. His words highlight a deep-seated belief that men relentlessly exploit and degrade the earth for their own gain.

This portrayal of mankind emphasizes the contrast between human actions and the natural order governed by Frith, the creator in the story. Holly's statement serves as a caution about the consequences of human greed and the moral responsibility humans have towards the earth and its creatures. It poses a stark reminder of the impact of humanity's choices on the world around them.