Extraversion genetics map across nations

Using the new Nature personality GWAS lead variants and global whole‑genome frequency panels, a country‑level test finds that only extraversion produces a consistent cross‑population signal across multiple datasets and checks. The analysis contrasts aggregate allele‑frequency maps with individual‑level genotype samples and self‑report scores to see which Big Five traits 'travel' across populations. — If only one personality trait (extraversion) shows a replicable cross‑population genetic signal, that both constrains and focuses debates about biological contributions to national stereotypes and about responsibly communicating polygenic findings.