I'm in the process of redpilling some normalfag friends about race realism. But they are the types that always ask "where is the study?" and "where is the proof?" regarding any information, since they can't think by themselves nor analyze something without a "professional study" guiding them. So, could some anons help me with articles, researches and overall studies about race realism? More specifically, how race is a deterministic factor in a person's preference for a sexual partner to procreate. And how race-mixing is biologically averted by all races. The more they go deep into the racial differences and racial preferences among the same race, the better. My friends are interested in the topic already, so nothing will shock them too much. Also, no jewish researches. Actual, serious research showing the differences (more importantly, the superiority of some races compared to the inferiority of other races) and all information that can debunk the lie of equality between races and the lie race mixing being a preference, instead of the anomaly that it is.