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2. How can we tell when a civilization has fallen? What are the signs?
Sign #1

Explanation:In a study published to Proceedings of the National Academy of Sciences, they explain that this new framework could help to prevent future catastrophes as the modern world copes with major societal shifts.

The researchers from the University of Maryland and University College London investigated whether early warning signals are present when an ecosystem begins to show declining resilience.

This phenomenon can indicate the forthcoming of ‘major reorganization,’ or a regime shift within the ecosystem, and subsequently, a collapse.

To do this, they examined 2,378 archaeological sites from nine regions of Neolithic Europe.

they were citizens but they could not vote and they did could not get involved into a political situation during that time.