DNA that hasn’t forgotten: what modern genetics really says about the Jewish people

Genetics does not prove myths and does not measure identity. But it shows that behind the millennia of Jewish history stand not only memory, faith, and culture, but also real traces of population past.
DNA and Jewish history: where myth ends and science begins

In the discussion about the origin of the Jewish people, there is always a risk of falling into one of two extremes. The first is to turn genetics into proof of ancient texts, as if a laboratory can confirm every line of the TANAKH. The second is to completely separate Jewish history from biology, as if two thousand years of diaspora, marriage norms, community life, and identity transmission could leave no trace in the genome.

Science does not confirm either of these extremes.

Modern population genetics speaks more cautiously and interestingly: many historical Jewish groups indeed retain a recognizable common component of origin, associated with ancient Middle Eastern populations. But this component is not a 'pure line,' does not negate mixing with surrounding peoples, and does not turn DNA into a test for Jewishness.

This is an important distinction.

The Jewish people are not a biological formula. Jewish identity is…

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