Living in a Genetic World

The paper, in plain language

Testing the rhetoric of blood

From Rwanda's 'cockroach' propaganda to consumer DNA tests, claims about groups' genetic relatedness saturate public life. With Sasha Kimel, Rowell Huesmann and Eran Halperin, I tested what such information does in a live conflict: Jewish and Arab participants read ostensibly real news articles describing the two peoples as genetic siblings or genetic strangers.

From attitudes to decibels

The siblings frame reduced explicit antipathy in both groups — specifically toward each other, not toward uninvolved groups — and Jewish participants who read it delivered quieter noise blasts to an alleged Arab opponent: less actual aggression, not just kinder ratings. On Israeli commuter trains, the strangers frame cut support for political compromise, raised support for excluding Palestinian citizens and for collective punishment, and drained hope, with constructive emotions carrying the effects. Tellingly, the harm ran through difference framing in Israel while the benefit ran through similarity framing in the US — genetic kinship may already be the quiet default where the conflict lives.

Why it matters

Journalists, geneticists and ancestry companies constantly put relatedness information into circulation; these experiments show it is not neutral. The honest print: effect sizes were small, implicit attitudes did not move, and one study's key effects were only marginal. But small effects from a few paragraphs of text, in one of the world's most entrenched conflicts, are exactly the kind of lever that scales with repetition — for peace or for its opposite. The study connects to my broader work on essentialism and dehumanization in intergroup conflict.