The only reason humans look different from one another is because of climate and geographical location. I'm against interracial dating because I believe we should only date people from the human race. The truth is, there are no separate races, only different ethnicities and nationalities. The concept of race was invented by humans in order to divide each other and create social hierarchies, much like the concept of class. It has allowed some to instigate prejudice over one ‘race’ of humans over another. Examples of this include Hitler’s holocaust of the Jews, or the Transatlantic Slave Trade.
Genetically, humans have all evolved from the same ancestors, but because of the natural need for classification we try and put labels on things. These include plants, animals, topics and the like. We could say that there are three different physical types of human; Negroid, Caucasoid and Mongoloid, and that all humans possess physical features pertaining to one of these ‘classifications.’ But realistically it shouldn’t matter. Racism will end when we all view each other as simply one human to the next. We need not divide each other using social constructions.
Good article about this: https://www.scientificamerican.com/article/race-is-a-social-construct-scientists-argue/