The nature/nurture fight is ongoing, and we do not know all of the variables/inputs, it seems to me.

I see a lot of difference, these days, between Americans and Euros. I have a lot of experience with the Euros so this is not just from watching Tik Tok videos or anything.

Euro folks are deeply propagandized/indoctrinated (as are Americans) so it's always difficult to tease out the nature/nurture. But back in the "pioneer days" the vast majority of those who came to the Americas and particularly those who did not just stop at Boston or New York City, were folks with a high risk tolerance. I have no doubt that a chunk of that (and indeed perhaps all of that) was "nurture". But equally, I don't think one would succeed in convincing me that we know enough about all of the inputs/factors to say that none of it was nature/selection.

In any case, it's fun to tease the Euros with this. :)