To advance to the next era you will have to get 1 Era Star, which you can get by completing any of these three tasks:
Its Emblematic Unit are the Nomads, special Units that gather Food through fighting and ransacking in order to multiply. Storytellers: Astronomy - Gives +1 Science per Population on City or Outpost.Farmers: Plant Lore - Gives +1 Food per Population on City or Outpost.
