Richard Heinberg's latest essay:
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Civilizations do roughly the same thing. In their early days, complex societies are populated with generalist pioneers (people who do lots of things reasonably well) living in an environment with abundant resources ready to be exploited. These people develop tools to enable them to exploit their resources more effectively. Division of labor and trade with increasingly distant regions also aids in more thorough resource exploitation. Trading and administrative centers, i.e., cities, appear and grow. Money is increasingly used to facilitate trade, while debt enables a transfer of consumption from the future to the present. Specialists in violence, armed with improved weaponry, conquer surrounding peoples.
Complexity (more kinds of tools, more social classes, more specialization) solves problems and enables accumulation of wealth, leading to a conservation phase during which an empire is built and great achievements are made in the arts and sciences. However, as time goes on, the costs of complexity accumulate and the resilience of the society declines. Tax burdens become unbearable, natural resources become depleted, environments become polluted, and conquered peoples become restless. At its height, each civilization appears stable and invincible. Yet it is just at this moment of triumph that it is vulnerable to external enemies and internal discord. Debt can no longer be repaid. Conquered peoples revolt. A natural disaster breaks open the façade of stability and control.
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https://www.resilience.org/stories/2...e-big-picture/
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