Even if they don’t, they might be treated as such—to humanity’s great costMOST PEOPLE believe humans are different. The reason is that Homo sapiens has evolved to be conscious. Many animals feel pain and pleasure; some appear to be self-aware. But the human mind’s unique potential to exhibit a sense of self marks out every member of the species for special treatment. Already have an account?Log in Continue with a free trial Get full access to our independent journalism for free Free trial O...