It does feel like an overwhelming task, but individuals can come together and our own actions do matter. We ended slavery: we can create huge positive change.

> We ended slavery

With at least one famous and bloody civil war in what is now a nuclear power. I’d rather not have one of those again, even though I’m increasingly of the suspicion that {the poorly specified concept named variously “sentience”, “ability to suffer”, or “consciousness”} is likely found in many more species than just humans.