In that respect, it’s a useful mindset training tool. Forces you to think, decide and act like a survivor.
Ahemn, yes, you see the "tribal" mindset people devolve into. That is why Balkanzation is so dangerous, that is why letting 25 Million Illegals into this country without them being assimilated is a TERRIBLE idea.
When you have groups at each others throats all the time you have a recipe for disaster!
People return to slavery, you have no water, no Power, or if you do you have to fight for it, al la Hoover Dam.
Strong men arise to carve out their own little fiefdoms, Caesar, the Enclave. (Hell in real life the barbarians in western Europe after the fall of Rome)
What else do you see in New Vegas that is turning into reality today Tadslos?