I assumed that you understood the difference between the theory of evolution and eugenics, so no worries. In these discussion it is often helpful to bring up the Is/Ought problem and how we determine our morality independently of how nature operates.
That's a good question. Dogs seem to do well being part of a human pack, and chimps seem to have done well in human care. But who knows . . .
On a slightly different note, there was a scientist who raised his own child right along side a baby chimp. Him and his wife treated both babies exactly the same in every way. During the experiment the chimp baby hit a cognitive wall and didn't develop any further. More interestingly, the scientists stopped the experiment somewhat abruptly. Some think it was due to the fact that their human baby was starting to mimic chimp sounds and they were worried that their human child would not develop properly.
This Guy Simultaneously Raised a Chimp and a Baby in Exactly the Same Way To See What Would Happen | Smart News | Smithsonian
Oh yes, I seem to remember seeing something about that as well, the child and the chimp I mean. Which brings me to something else. I've heard that it's not the size of brain ratio to size of creature that determines intelligence so much (however intelligence might be defined,,,apparently there are different types, apart from IQ which is a minefield in itself, but spatial, manual, I think, can't remember them all), but rather how many 'wrinkles' or folds in the brain.
What is also fascinating is that sometimes where a part of the brain is damaged, neural paths can relink elsewhere or something, so that the person can still function. Not only that, but some people see words as colours and various things like that.
We also see or recognise colours differently as well. There's a group of people somewhere who will differentiate between different shades of the same colour, that people in say our environment, can't see. Well, we might be able to see brown, but not such subtle variations as they can. But these other people couldn't 'see', say red. They live in an area where there is a lot of brown and maybe green and I assume blue, like the sky.
So perhaps if they came to live in a country with traffic lights and such, it would be difficult for them to function as well as us...and maybe vice versa. I'm not sure that it's they or us are colour blind as such, but perhaps with training or practice we and they could get to see these colours. I have a friend who used to be a printer and he's extremely good at colour differentiation as he had to match mixes and things.
If one takes what would be called turquoise, I've noticed people tend to see that differently. My husband might see it as more blue, but I might see it as more green. Can't remember whether my friend sees it the way I do or the way my husband does. But it's interesting that our eyes pick up one colour or the other more predominantly.