All human traits are highly heritable with virtually zero parent-child phenotypic transmission except politics, education, income, wealth.
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Everything is heritable. Average trait has equal genetic and environmental influences. All traits below 100% heritability show shared environment effects. Phenotypic transmission from parents to children absent except politics (5-10%), education (2%), income (5%), wealth (6%). These transmissions likely environmental confounding from correlated parental-child environments. IQ heritability 60-80% with no cultural transmission. Intelligence shows high MZ/DZ differences confirming genetics dominate. Adoptive parent-child IQ correlation due to selective placement, not transmission. Height heritability near 90% in adults. BMI heritability 40-60% with possible twin-specific effects violating EEA. Lifespan heritability 20-25% overall but 50%+ for intrinsic biological aging excluding extrinsic deaths. Personality heritability averages 75% using peer/self-reports. Political orientation 40-47% genetic plus 23% social transmission. Permanent income heritability 50%. Educational attainment narrow-sense heritability 39-46%. No trait has zero shared environment unless 100% heritable. Heritability methods across family types consistent.

Genetics Intelligence Psychology Politics Economy Science

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