Our dating life explained by science

8,000 years ago females made a choice that erased 90% of males forever

(Psychryptoria) Dec. 6, 2025: Eight thousand years ago, 17 females reproduced for every 1 male. And 90% of male bloodlines vanished—not through war, plague, or disaster, but through female choice and economics.

This is the story of the "Neolithic Bottleneck (population bottleneck)." Discover how

• the agricultural revolution (spread of farming) created the most extreme genetic selection event in human history,
• why Y-chromosome diversity collapsed while female lineages stayed intact, and
• how this ancient pattern still shapes modern dating,
• wealth inequality, and
• reproductive dynamics today.

What viewers will learn:

• The genetic evidence behind the 17:1 ratio
• How agriculture transformed mating selection
• Why hypergamy became an evolutionary strategy
• The connection between ancient bottlenecks and modern dating apps
• What this means for our DNA and relationships today

How empire profits from boys

Research Notes and Key Sources:

• Karmin et al. (2015) - "A recent bottleneck of Y chromosome diversity coincides with a global change in culture" Genome Research, 25(4):459-466 https://www.ncbi.nlm.nih.gov/pmc/arti... https://pubmed.ncbi.nlm.nih.gov/25770...
• Zeng et al. (2018) - "Cultural hitchhiking and competition between patrilineal kin groups explain the post-Neolithic Y-chromosome bottleneck" Nature Communications, 9:2077 https://www.nature.com/articles/s4146... https://www.ncbi.nlm.nih.gov/pmc/arti...
• Schulting & Fibiger (2023) - "Conflict, violence, and warfare among early farmers in Northwestern Europe" PNAS, 120(16) https://www.pnas.org/doi/10.1073/pnas... https://www.ncbi.nlm.nih.gov/pmc/arti...
• von Rueden & Jaeggi (2016) - "Men's status and reproductive success in 33 nonindustrial societies: Effects of subsistence, marriage system, and reproductive strategy" PNAS, 113(39):10824-10829 https://www.pnas.org/doi/10.1073/pnas... https://www.ncbi.nlm.nih.gov/pmc/arti...
• Rivollat et al. (2023) - "Extensive pedigrees reveal the social organization of a Neolithic community" Nature, 620:600-606 https://www.nature.com/articles/s4158...

Does this change how you see modern relationships? Comment. Subscribe for more deep dives into human evolution and behavior. #NeolithicBottleneck #HumanEvolution #DatingPsychology #Hypergamy #GeneticHistory #EvolutionaryPsychology

• 8,000 Years Ago Women Made a Choice That Erased 90% of Men Forever

Winter Solstice 2025 arrives (12/21)

Winter Solstice at Ireland's Newgrange attracts 2,000 visitors

Around 2,000 people have gathered at Newgrange, Ireland, to celebrate the winter solstice, Dec. 21, 2025.

The Neolithic passage tomb, part of the Brú no Bóinne complex, is designed so sunlight enters the inner chamber at dawn on the solstice.

• In pictures: Druids descend on Stonehenge to mark winter solstice

Skies were mostly clear, but low clouds on the eastern horizon obscured the sunrise.

Even so, enough light filtered through the roof box for the effect to be visible. As the clouds lifted later in the morning, visitors lined up for a chance to enter the sacred chamber. More

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Radio Telefis Eireann video via MSN.com, 12/21/25; Pat Macpherson, Dhr. Seven (eds.), Wisdom Quarterly