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.
Evidentemente la respuesta a esta pregunta no se reduce a un único factor. Si alguien les dice que hay un factor único que explica el colapso de las sociedades, ustedes saben inmediatamente que es un idiota. Es un asunto complicado.