Theories of evolutionism and racial determinism

Explain how the ideas/theories of evolutionism and racial determinism (be careful, this is about cultural, not physical evolution) affected the way colonizing powers saw and behaved towards indigenous peoples. How are these ideas still evident today in our society?

You can use your own innate knowledge, common sense, imagination, and creativity and any readings, I am just looking for a better understanding from someone’s experience of all this – the more info the better so write however much you want to express, it can only help me, thank you)