Modern Humans

Modern humans were not on Mars during the Ancient Era. In the Modern Era, they are a mix of different nationalities that lived on Earth during the first stages of colonization. Since colonization was mostly organized and funded by private corporations, the bulk populations that first moved to Mars were congruent with the countries where these corporations were based.

People born on Mars develop slightly differently as they grow up than they would have on Earth with the same genetics. The low gravity of Mars has an effect on their muscular and skeletal systems, although with proper medication and physical therapy this can be bypassed. People that do not have access to these things while growing up are perceived as invalids by many.