Summary
This quote suggests that civilizations tend to collapse and decline due to internal factors rather than external threats. It implies that the downfall is a result of the society's own actions, choices, and failures, rather than being forcibly destroyed by external forces. In other words, civilizations destroy themselves through self-destructive behaviors, whether it be in the form of societal decay, moral decline, or ecological irresponsibility. It underscores the importance of recognizing and addressing internal issues to ensure a civilization's survival and prosperity.