We’re all animals, but some are more animal than others.
See, in a place like Africa, Indian or the Americas, the number of domesticable animals was slim. In South America the only good candidate was the llama, and we see how well that worked out. You can’t raise bison or use them to plow fields, and good luck getting a tiger to do much more than rip your face off, or a zebra to behave like a horse. In places like Asia and Europe where there were wild horses, dogs, pigs, cattle– there was more opportunity to domesticate and thus more opportunity to progress into modernity using mechanical revolution. So time goes by, and hundreds of years later, these people have built cities and ships, and decided, ‘Hey, you know what’d be great? Let’s go conquer some shit.’ When these people arrive in places like Africa, the Americas and others, they find people who are resource rich and mechanically poor for no other reason other than luck of the draw. In turn, these explorers dubbed these people ‘savage’ and 'primitive’ because how else do we make meaning of who /we/ are than by contrasting the differences with something else (see: binary opposition). These people were enslaved, their resources plundered, and all the while, 'The White Man’ used their influence to convince people that they were less than people because they weren’t 'Like us.’ Which is something that’s easy to believe when you can physically see differences in your way of life against someone else’s. The reality is, what was done to these people was probably more defining of what is savage in humans than what limitations held back their societal progress, but to acknowledge that is to say /we/ are the savage, and because 'The White Man’ still controls the majority power in the world, that kind of discourse is not going to change any time soon. That is, unless we decide it has to. Change takes time. Change of discourse takes even longer to change. This isn’t about including a diverse cast of characters in your novel or on a TV show. It isn’t about more black actors being celebrated for no other good reason than 'we need diversity at the Oscars.’ PC culture is /not/ about being more inclusive for the sake of appeasing a group of people, it’s about changing the way we think about people from the ground up, because historically, we have been unfair in that conversation. It is nearly impossible not to think of the marginalized as 'the other’ because it is the way society has always labeled them from the dawn of the agricultural revolution. But we are smart enough and kind enough to recognize that we’ve done wrong, and that we must be the driving force to change. Inclusion and diversity is not about appeasing people because they need special treatment, it’s about recognizing the marginalized for what they are: Human.
In conclusion: We are all animals, but some are more animal than others.