What was the key to the prosperity of the minoan civilization?

The key to the prosperity was it's surrounded by fertile soils and it's located near the seas.
By having a lot of fertile soils, Minoan civilizations have the capabilities to produce a lot of good quality agricultural products and boost their economic growth. The location near the sea makes them able to obtain a lot of maritime resources and it also protects them from other tribes' attack.

Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor