Progressive Politics

I feel like saying it's normal for empires to fall due to external causes is not accurate? It's usually the exception. Maybe the external factor is the final kick, knocking over a rotting house of cards, but the cause is almost always division, internal conflict, or unsustainable growth. An empire is much more likely to collapse under its own weight than it is to have Alexander the Great kick its teeth in. The Ottoman Empire was called "The Sick Man of Europe" for a reason.