Those who consume animals not only harm those animals and endanger themselves, but they also threaten the well-being of other humans who currently or… - David Benatar

Some of the harm that humans cause to other humans and to animals is mediated by the destructive effect that humans have on the environment. For much of human history, the damage was local. Groups of humans fouled their immediate environment. In recent centuries the human impact has increased exponentially and the threat is now to the global environment. The increased threat is a product of two interacting factors–the exponential growth of the human population combined with significant increases in negative effects per capita. The latter is the result of industrialization and increased consumption.

Assuming that each couple has three children, an original pair's cumulative descendants over ten generations amount to 88,572 people. That constitutes a lot of pointless, avoidable suffering. To be sure, full responsibility for it all does not lie with the original couple because each new generation faces the choice of whether to continue that line of descendants. Nevertheless, they bear some responsibility for the generations that ensue. If one does not desist from having children, one can hardly expect one's descendants to do so.

Humans inflict untold suffering and death on many billions of animals every year, and the overwhelming majority of humans are heavily complicit.