I'll let you guys handle the game mechanics, but here is my brief idea for an outline.
Era of PrehistoryAge of TerraformingThe landforms and environment of the world are created.
Age of ProliferationAn age spanning from the dawn of the anatomically modern human to the beginning of settlement. Age lasts from 200,000 years ago until about 15,000 years ago. During this phase, players will be spreading humans across the planet while simultaneously developing various races, eventually coming to the point of the planets first settlements.
Age of DomesticationSpans the time from the beginning of settlements about 15,000 years ago until the development of writing (alternatively, the development of bronze working, as these things happened at about the same time) about 5,000 years ago. During this phase, players will be developing settlements, starting with isolated villages, domestication various animals and plants, and eventually leading to the beginnings of multi-city civilizations.
None of the names here are final and we can go into better detail once we nail down for sure what we want to do. We've just completed the "Age of Terraforming" and are about to enter the "Age of Proliferation." One thing to remember about the ages, they are defined by the most advanced people of the age. There will still be plenty of peoples that are technologically still within previous ages. Even to this day, we have peoples that are still in what I've called here the "Age of Proliferation." [see:
Sentinelese]
Thoughts, everybody?