We have not done enough. In fact, we are making this situation worse. Racism is not something to tolerate with through violence, I think if we actually solved the problem with peace and change the minds of others, we will do better. I know someone who was anti-racist, but he got targetted from an anti-racist group and it changed him into a racist. (His name is Paul Miller, he is really inspirational if I am honest)
We honestly haven’t. There’s still stereotypes against different races and a lot of people tend to believe and go along with them. Like the Asian hate crimes where people are stereotyping them as a virus. We need to get rid of these stereotypes and hopefully can move on and help end racism. But this will take time so let’s just be patient.
The biological factors that may increase the risk for aggressive or illegal behavior would be brain injuries, exposure to lead or other toxins before birth.