And does focus on political violence in particular (terrorism, rioting, and one more I couldn't pick out of the abstract). Would be interestig to read the whole thing, but thanks for following up! I wonder if the amount of young men in the US that were swayed by Russian influence operations over the last several years would be in-step with this logic.
"Peak danger for societies ... [is] when there's a bulge in the rates of young, unmarried men"
Could you provide a source for that? There are more unmarried men per capita now than almost any time over the last 100 years [1], yet violent crime has been declining steadily - most people can't seem to agree why, though. [2]
I can guarantee you that there are Texans who prefer their F-250 King Ranch diesel fine-tuned six different ways to Sunday more than any fancy foreign thing.