Obviously the answer to this question is not going to be a single factor. If anyone tells you that there is a single-factor explanation for societal collapses, you know right away that they're an idiot. This is a complex subject.
Odgovor na ovo pitanje očito neće biti samo jedan čimbenik. Ako vam netko kaže da samo jedan čimbenik objašnjava društvene kolapse, odmah znate da je budala. To je složena tema.