I2-S2639 Mesolithic British

Migration calculated from samples in the YFull tree 12-10-2018. I2 is believed to have survived the ice age in a European refugium before moving back to previously inhabited areas. Link to most up-to-date migration.

The diversity below S2639 in the British Isles is so great that it appears valid to conclude that this man spent most or all of his life there about 7000 years ago. This predates the introduction of agriculture into the region by about 1000 years. This affirms the commonly accepted view that I2 was associated with hunter-gatherers in Europe.

"Archaeologist and prehistorian Caroline Malone noted that during the Late Mesolithic, the British Isles were something of a "technological backwater" in European terms, still living as a hunter-gatherer society whilst most of southern Europe had already taken up agriculture and sedentary living."

Interestingly, the introduction of S2639 into England (or at least its diversification there) happened roughly 1000 years after flooding separated England from continental Europe - possibly caused by a tsunami from Norway. The landmass known as Doggerland had previously connected England to the Netherlands and western coasts of Germany.

Map showing hypothetical extent of Doggerland (c. 10,000 BC), which provided a land bridge between Great Britain and continental Europe

Perhaps the aftermath of the flooding on coastal populations wiped out the other siblings or cousins of S2369, resulting in a 3000 year bottleneck from 10,000 ybp to 7000 ybp.

Deep diversity of S2639 confined to the British Isles suggests this was where S2639 lived about 7000 years ago

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