The window for great-grandmothers is closing

Later Childbearing & Demographic Trends

• Many note that age at first birth has risen 4–10 years over recent decades in most rich countries; US data and personal anecdotes support this.
• Fewer children per family and later starts reduce the probability of living to see grandchildren or great‑grandchildren, even as lifespan rises modestly for adults.
• Some argue there may be fewer great‑grandparents as a share of the population, but others point out absolute numbers may not fall if populations remain larger.

Life Expectancy & Great‑Grandparents in History

• Multiple commenters stress that historical “life expectancy ~40–50” was driven largely by infant/child mortality.
• Adults who reached 15–20 often lived into their 60s or beyond, so great‑grandparents likely weren’t as rare historically as the article implies.
• Several call misusing life expectancy at birth for this argument a common “rookie mistake.”

Class, “Idiocracy,” and Fertility

• One thread debates “idiocracy bias”: educated, affluent people delaying or avoiding children while poorer or less educated groups have more, and what that implies for future public opinion.
• Others call this view classist and overconfident about how faithfully children inherit parents’ beliefs; social mobility and value shifts are emphasized.
• Some note that teen/early‑20s childbearing remains common in some communities, often correlated with lower income and weaker sex education.

Environment, Population & Ethics

• Dispute over whether large families are environmentally irresponsible vs. whether population is already on track to peak and decline.
• One side cites ecological overshoot and Earth Overshoot Day; the other argues human innovation repeatedly increases carrying capacity and that overshoot is overstated.
• Fairness concerns arise (e.g., rich high‑emitters vs. poorer large families).

Parenting Age: Tradeoffs

• Younger parents: more energy, longer overlap with kids/grandkids, more help from relatively young grandparents—but more financial instability and immaturity.
• Older parents: better finances, emotional regulation, and career stability, but reduced fertility, higher medical risks, and less shared life with descendants.
• Many stress there is never a “perfect” time; people delay due to housing costs, job precarity, lack of support networks, and broader societal instability.

Family Structure & Support Networks

• Strong emphasis on the practical value of nearby grandparents for childcare and emotional continuity.
• Some cultures (e.g., Chinese, Indian, Amish) routinely involve grandparents heavily; others describe frayed intergenerational ties due to migration, late retirement, and smaller families.
• Concern that shrinking cousin networks and older, working grandparents weaken intergenerational bonds and tradition transmission.