The fact that we don't treat actual humans humanely may very well be on a continuum with the fact that we don't treat animals as having human-level rights. Ult

The fact that we don't treat actual humans humanely may very well be on a continuum with the fact that we don't treat animals as having human-level rights. Ultimately, it may not be that things that are sentient have inviolable rights; it may be that we simply draw a moral circle around ourselves and if you're close enough in the circle, you're protected; if not, you're not. There may be a good historical reason for that; there's anthropological evidence that our early ancestors shared the planet with creatures who were a lot closer to them in both look and behavior than anything living today and that were competing fiercely and in a zero-sum style for overlapping resources. It's not a large leap to imagine that our developed morality therefore accounts for creatures with every bit the cognitive capacity of your own that you cannot coexist peaceably with for risk that they'll end you and your entire bloodline by out-competing you. Whether that's the way we should approach the world (in a modern era where our species dominates the planet's resource allocation and is threatened by functionally zero complex organisms) is a reasonable question; it may very well still be a framework that describes morality for a great deal of the planet's population.