Mark, interesting graph. Do you know the source?
I guess the GPD is adjusted by the Power Purchase Parity, right?. Because the Argentina per capita GDP is below 10k U.S. dollars.
Also, I’d like to know how they measured the religiosity because I see a couple of counterintuitive positions ( based on my perceptions, of course). For instance, I wouldn’t say that argentina is less religious than the US: until 1994, the argentina’s president should be catholic and the constitution declared that the goverment supports/mantains (the spanish word used is ambigous) the catholic church.