Heritability of human life span is ~50% when heritability is redefined

3 days ago

Heritability is a concept that can be redefined to yield different percentages by excluding environmental factors.
The paper simulates a hypothetical world with no non-aging-related deaths, finding lifespan heritability increases to 46-57%.
Traditional twin studies estimate lifespan heritability at 23-35%, but the model suggests it could be higher with lower extrinsic mortality.
The authors criticize Science's vague writing style and lack of detailed methodology in the paper.
Heritability depends on societal factors and changes with environmental conditions, emphasizing its nature as a ratio rather than a fixed value.

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