If you're white, you likely have racial bias you can't control

[hollohas]

Yes, we learned all about this concept in high school. Back then, it was considered homogeneity, and it applied to EVERYONE, not just whites. People have a tendency to prefer others from the same cultural, social, biological, and other similar backgrounds.

This is absolutely true. Even little, innocent preschoolers hang out with kids similar to themselves out on the playground. The boys hang with the boys, girls with girls, Hispanics with Hispanics, etc. I've witnessed 3 year old kids form cliques based on these traits.