system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any correlation between the frequency of left-handedness in a population and the population's writing system being read right-to-left?

I've always assumed most of the languages I encounter are read left-to-right and top-to-bottom due to the majority of the population being right-handed, therefore avoiding smudging when writing. However, when I take into account the fact that many languages are read right-to-left, this connection becomes more tenuous. 

Are writing systems entirely a function of culture, or is there evidence for biological/behavioural causes?
gpt
Are there even any instances of abnormal amounts of left-handed populations in history? Probably not many (if any), and definitely not enough to be instrumental in developing writing systems. Remember “writing” didn’t start on paper, so throw out the whole notion of writing being easier one direction or another because of hand dragging and ink smudging.