You're the leader of a great nation which is currently expanding. Over the course of the seven decades covered by the game, you will have to invest in infrastructures and industries, provide your country with energy and finance the mercurial forces of research in order to remain competitive.
But prosperity has a price. You owe it to future generations to leave them a healthy world. Pollution lurks, but will you be able to limit it?
Prosperity has players building up their countries on a grand but abstract scale, with them needing to balance concerns over energy and ecology with the constant need for capital and the long-term goal of prosperity points.