If you're genuinely asking, it's because: - Race is immutable, and can't be faked - Race is linked to genetics (ingroup preference increases YOUR genetic prol

If you're genuinely asking, it's because: - Race is immutable, and can't be faked - Race is linked to genetics (ingroup preference increases YOUR genetic proliferation) - For millions of years, we've done it this way (there were no class problems in prehistoric times)