Just like male is the main/default gender
male is not default because if everyone was default humanity would perish, both sexes rely on each other so you cannot say either is default
as for the races... originally humans had darker skin. now, there are two different theories to humanity: the cradle of humankind being singularly in africa, or as they spread out they started becoming more humanlike (like they were mingling with black europeans and africans). either way, they had dark skin, it will take a while before humans develop different tones.
The current population of Eastern Asia is
1,661,374,088 as of Saturday, July 27, 2024, based on the latest United Nations estimates. Eastern Asia population is equivalent to 20.66% of the total world population. Eastern Asia ranks number 2 in Asia among subregions ranked by Population. The current population of Southern Asia is
2,050,797,342 as of Saturday, July 27, 2024, based on the latest United Nations estimates. Southern Asia population is equivalent to 25.2% of the total world population. Southern Asia ranks number 1 in Asia among subregions ranked by Population.
Currently, India and China have the most population. So asian or brown if you are going for population size.