Quote by Henry David Thoreau
I have no doubt that it is a part of the destiny of the human race, in its gradual improvement, to leave off eating animals, as surely as the savage tribes have left off eating each other when they came in contact with the more civilized.
Summary
This quote suggests that as human civilization progresses, it is inevitable that we will eventually stop consuming animals, just like how savage tribes gave up cannibalism when they interacted with more civilized societies. It implies that our moral development and societal advancement will lead us towards rejecting the consumption of animals, indicating a belief in the inherent evolution of human ethics and behaviors.