The Eden Cycle?

If you realize that only the last 10,000 years to 12,000 years has been warm enough for civilizations to develop by having the capacity to grow food and cities of commerce, then maybe the last 10,000 to 12,000 years could be called the Eden Cycle which we are presently in where civilizations could exist (at least in their present form). Because as weather gets either hotter, colder or windier (one of the three or all three) across the planet people likely will have to move underground where temperature extremes are more manageable. However, moving underground you have to worry about leaks from underground streams and rivers and surface flooding also. So, people are going to have to adapt to all the changes whether it is colder, warmer, flooding or droughting or winds increasing on the surface of the planet in any innovative way possible from now on.

In some ways you can say it has always been this way and people have always tended to migrate away from droughts and flooding as necessary to survive. If some place gets to hot consistently they move away and if some place gets to consistently windy they move away and if some  place gets too droughted for too long they move away, (hopefully someplace better). This is just the human experience down through time and into the future.

However, it is possible that the Eden Cycle we presently are in is either getting hotter or colder (or both) in different places from now on around the Earth.