[iguy]

To be clear, my claim above is that the church, as a centralising power structure in "christaindom" circa 1000AD, played some role in pushing the culture there towards openness, or in making extended families less important.

Claiming that christianity always and everywhere does this would be pretty obviously wrong, and I did not say this. And indeed even within europe today, catholic-ness is anti-correlated with this kind of "openness" -- because the core relevant for this has long since gone protestant or atheist.

I hold this claim weakly. There are other arguments for what happened. But regardless of why, my main point was that Europe (and especially a core area) was an outlier on this universalist/clannish scale. And that both ends have advantages, depending on the situation.

[tathougies]

But still this doesn't make sense, as Latin America was converted in the 1500s, well after the 1000 AD change that you claim occurred. Latin America, despite having 500 years for Catholicism to settle in, is still really big into the extended family.

I think a better explanation is the Protestant reformation weakened the idea that any person should subjugate their own personal individual desires for the greater good, with its emphasis on an individual quest for truth, an idea which has now permeated western culture. This makes sense with what I've experienced of non-European Catholicism, which mostly just finds Protestantism bizzare and confusing.

[sDlEzAtyoNAz]

>despite having 500 years for Catholicism to settle in, is still really big into the extended family.

And? The people running the catholic church around 1000 AD were not running the catholic church in Latin America in 1500 AD.