The quote by C.S. Lewis suggests a troubling line of reasoning regarding the treatment of individuals who are seen as weaker or less capable. He implies that if society justifies harming animals due to their inability to resist or defend themselves, it raises a moral question about extending that rationale to other groups, such as those deemed imbeciles, criminals, enemies, or capitalists. This perspective critiques a utilitarian view of existence that prioritizes power over empathy and justice.

Moreover, Lewis challenges readers to reflect on the implications of such logic in ethical discussions. If might makes right, then almost any group could be subjected to harm under the guise of survival. This notion raises significant ethical concerns about how society values life and defines the criteria for acceptable behavior in the struggle for existence, urging a reconsideration of morality that respects the dignity of all individuals, regardless of their societal standing.