Success breeds success. Anything which alters its environment to increase production of itself is playing the game of increasing returns. And all large, sustaining systems play the game. The law operates in economics, biology, computer science, and human psychology. Life on Earth alters Earth to beget more life.
Confidence builds confidence.
Order generates more order. Them that has, gets. Grow by chunking. The only way to make a complex system that works is to begin with a simple system that works. To assemble a prairie takes time-even if you have all the pieces.