We have soft shitty diets, which leads to poor oral and body posture. Our sentient lifestyles also wreck posture. The cumulative effect is that our jaws don’t become developed and wide enough to accommodate all your teeth, so they crowd and most people have wisdom tooth problems.
It can be corrected to an extent through proper tongue and body posture changes, and chewing hard gum. See r/mewing and r/orthotropics
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