In nature when you have multiple similar species coexisting together, they usually do so because they occupy slightly different niches from one another. In a world with multiple sapient humanoid species, humans probably wouldn't be outright dominant. Now given all of this in a world with multiple hominids (all of which are just as smart as us) why would humans be the dominant race, and why wouldn't they just kill all the other races? Weaknesses: somewhat shorter, and are the slowest Strengths: proportionately the strongest, and have slightly better eyesight.

Weaknesses: shortest, and have slightly worse eyesight Strengths: have the best sense of hearing and smell, and are proportionately stronger than humans Strengths: finer motor controls, best eyesight, and are proportionately stronger than humans Weaknesses: are the weakest, are more susceptible to injuries, and are the least fertile Strengths: have better eyesight and hearing, are faster and more agile, have a slightly stronger grip, and live twice as long Weaknesses: are slightly slower and have the worse endurance Strengths: twice as strong and have a mildly improved sense of smell

Why is that? Firstly, I guess I should give every race in my story strengths and weaknesses. Humans, in most fantasy stories including in my own, are the dominant species.

Why does dominant traits show up rarely