Handedness
See the global prevalence of left-handedness, country breakdowns, and what the research says about cognitive differences.
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90.1%
of all humans — about 7208M people
Notable right-handed people
What the research shows: Right-handedness correlates with left-hemisphere language dominance in ~96% of cases. The bias toward right-handedness appears in all known cultures throughout history — the trait is universal.
Put It In Context
Handedness exists across the animal kingdom — but humans are unique in the scale of the asymmetry. Other primates show individual preferences with no population-level bias. In parrots, ~70% are left-footed. In cats, females tend to be right-pawed and males left-pawed. The consistent ~90/10 human split, stable across cultures for at least 10,000 years, suggests a strong genetic and developmental component — the exact genes remain partly unknown.
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