Humans started nomads and then became sedentary, not the other way around.

Why?

In order to grow, you must explore and take risks.

Once humans "settled down", hell on Earth started.

The solution is to go back and live in harmony with Nature, instead of living a dependent life being a passive consumer.

People (me included) rely on others for food and water. This creates the need for massive operations that ultimately destroy us.

Ignorance will kill us all.