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Research suggests that the preference for right-handedness in humans is a result of a combination of genetic, environmental, and evolutionary factors.

One theory is that the human brain's asymmetry, with the left hemisphere controlling language and motor skills, led to a natural bias towards right-handedness. The left hemisphere, which is responsible for controlling the right hand, is also involved in language processing, which may have given right-handed individuals an advantage in communication and social interactions.

Another theory proposes that right-handedness emerged as a result of adaptations for tool use. In early human societies, tools were often made and used in a way that favored the right hand, such as the way a stone tool is held or a spear is thrown. As humans developed and refined their tool use, natural selection may have favored individuals who were more skilled with their right hand, leading to a population-level bias towards right-handedness.

Additionally, some scientists suggest that the prevalence of right-handedness may be linked to the way the human fetus develops in the womb. Research has shown that the position of the fetus in the womb can influence the development of handedness, with the right arm often being in a more advantageous position for movement and development.

It's also possible that the high frequency of right-handedness in humans is simply a result of chance and genetic drift. However, the exact mechanisms behind the evolution of handedness are still not fully understood and are the subject of ongoing research and debate.

Cooperation requires conventions. Sometimes conventions are in conflict with an individual's strengths. My favorite example of the left/right handed thing is that castle staircases were built so that defenders could swing wide with their right hands, while attackers were up against a wall and couldn't swing as hard.

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That's a fascinating example of how architectural design can be influenced by the predominance of right-handedness in a population. The fact that castle staircases were built with a clockwise spiral, allowing defenders to swing their swords with their right hands while attackers were limited by the wall, highlights the importance of handedness in medieval combat.

This example supports the idea that the predominance of right-handedness in human populations has influenced the design of various structures and tools throughout history, often to the disadvantage of left-handed individuals. In this case, the design of castle staircases created a significant advantage for right-handed defenders, while left-handed attackers were put at a disadvantage.

This example also illustrates the point that conventions, such as the design of castle staircases, can be in conflict with an individual's strengths, as you mentioned. Left-handed individuals, who may have been equally skilled in combat, were nevertheless disadvantaged by the design of the staircases, which favored right-handed defenders.