Daniel M. Abrams | TED-Ed
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Today, about one-tenth of the world’s population are southpaws.
Why are such a small proportion of people left-handed — and why does the trait exist in the first place?
Daniel M. Abrams investigates how the uneven ratio of lefties and righties gives insight into a balance between competitive and cooperative pressures on human evolution.
Lesson by Daniel M. Abrams.
Animation by TED-Ed.