The "Stone Age" times were hard indeed. In their roles as hunters, collectors, farmers, and tool makers, our ancestors worked with their legs and backs straining against wooden plows in the stony earth. Of course, progress did not stop with the wooden plow. People always searched for better tools and more productive plants to make their work more effective.
In Stone Age, the players live in this time, just as our ancestors did. They collect wood, break stone and wash their gold from the river. They trade freely, expand their village and so achieve new levels of civilization. With a balance of luck and planning, the players compete for food in this pre-historic time.
With "The Expansion" the game now accommodates 5 players, plus as the Cave persons have advanced and stabilized, they have developed their own new market system.