Diversity

http://pubs.aeaweb.org/doi/pdfplus/10.1257/aer.20150243

Conclusion and Sections on Conflict show enough meat for altright. In fact, genetic diversity is shown to be a bigger deal than cultural diversity

They invoke the Lewontin debate and suggest it means their findings are, like his, not actually that significant since the 1% between groups matters more than the 99% we all see by dint of being in groups.

And the argument was more robust than they were presenting
http://archive.is/Klf2J