The Traveller authors realized this problem somewhat late, andReynard said:I'm more inpressed the various humans breeds common in Traveller don't show as much variety as vargr. H. erectus was clay 300K ago and the many worlds they were transplanted to should have shaped them. You can put a darrian, zhodani, vilani and solomani in a line and there is very little difference externally or internally. There is more variety between humans separated by geography and climate on Earth alone.
then added numerous minor human subspecies which had evol-
ved differently from the three human subspecies (Solomani, Vi-
lani, Zhodani) introduced earlier on. Examples are the Geonee
(a bit like fantasy dwarves), the Suerrat or the Thaggeshi.