The Grandmother Hypothesis
Post-reproductive support may contribute to inclusive fitness in humans.
The Mechanism: The grandmother hypothesis proposes that older women may increase the survival of descendants by providing care, knowledge, and resources. It is one account of menopause's evolution among several hypotheses and remains debated.
The Philosophical Pivot: A person's value cannot be reduced to reproductive output, even when evolutionary models ask how traits affect reproduction. Explaining a possible function is not the same as defining a life's purpose.
The Horizon: Human longevity and caregiving are shaped by social organization, culture, and cooperation across generations. The hypothesis draws attention to contributions that a narrow focus on individual reproduction might overlook.
Evidence varies across populations and conditions, so the model should not become a universal story about what older women are for.
Care can matter because of relationships and commitments, not only because it improves a genetic calculation.
A possible evolutionary function is not a person's assigned purpose.
When I explain care through its benefits to others, have I forgotten the value of the person giving it?