After long pondering, I believe that I can define good and evil in terms to which even a biologist of the mechanical school can hardly take exception… - Alexander Skutch

[If evolution had been guided, the Earth would have become] the abode of a vast diversity of creatures dwelling in concord (instead of) a place of mixed character, where beauty and ugliness, peace and fear, happiness and horror, mingle together in the most perplexing contrasts.

The evolutionary impulsion to increase fecundity, technically known as fitness, at whatever cost is responsible for most of the ugliness, strife, and suffering that afflict the living community on the fairest planet illuminated by the Sun.

I have come to view vegetarianism as a standing protest against predation, which is life's greatest evil. If there were no other argument in its favor, that would be sufficient.