I think that prepper scenario is way more likely in a «I got mine, screw you» society like the US. All the countries you list have their issues, but their base level of societal egalitarism is orders of magnitude higher.
I would not be surprised if the US is one of the few countries to end up like Mad Max if the world order should fully collapse due to climate change or other large scale events.
I would not be surprised if the US is one of the few countries to end up like Mad Max if the world order should fully collapse due to climate change or other large scale events.