 In the early stages of the game, you will encounter uncivilized villages consisting of primitives such as barbarians and friendly villages.Over time, further settlers can be created, forming new cities; buildings can be built to improve each city's overall productivity; military units can be formed, focusing either on defense, offense, or exploration; technologies can be researched, allowing for newer buildings and units; etc.Buildings in a final category, "Wonders", provide major advantages to the civilization that builds it, either across their entire empire or just in the building city, depending on the Wonder.