>>12617391There is little evidence that other non-humans - even the higher apes, our closest relatives evolutionarily speaking - show any signs of population-level handedness. No preference has been observed at the species or population level, where it appears to remain close to 50% right and 50% left. Researchers have even tried to breed animals according to their paw preference, but the resulting generations still exhibit a random mix. Thus, although the lower animals may show handedness, they do not show right-handedness or left-handedness.
Some primates, like chimps, have even even been observed in captivity with slight right-handedness preference.
This implies that for some reason, right-handedness was selected for in humans. Perhaps because we started engaging in more complex, and intricate actions that required steady handling and precise locomotives which forced right-handedness. Early stone tools indicate a right-hand preference, and so does paleolithic art. Most prehistoric handprints are of the right hand, while painted hand silhouettes are usually of the left, suggesting they were drawn with the right. Today, about 90 percent of humans are right-handed. So it was selected for for one reason or another.
