Population relates to how close one of your cities is to leveling up. Underneath each city is a bar with a segmented bar, the number of segments indicates how much population you need to level the city up. Your current progress is indicated in the blue segments. The dots within the segments, however, indicate how many units that city is currently supporting. You cannot have more units than segments.
To gain more population for a city a number of things can be done:
|Action||Population Growth||Stars spent||Growth: Stars ratio||Technology needed|
|Temple (Water, Mountain, Normal)||1||20||0.05||Aquatism, Free spirit and Meditation|
|Sawmill||1 per lumber hut adjacent to the sawmill||5||varies||Mathematics|
|Windmill||1 per farm adjacent to the windmill||5||varies||Construction|
|Forge||2 per mine adjacent to the forge||5||varies||Smithery|
Population Upgrades Edit
Here are all the rewards for upgrading a city:
- Level 2 City: Workshop or Explorer
- Level 3 City: City Wall or Resources
- Level 4 City: Population Growth or Border Growth
- Level 5 and Up: Park or Super Unit
Negative Population (Anti-Food) Edit
If a city ever loses population (i.e. a city disconnected from the capital, a Nature Bunny trampling a building, destroying a building) and your population bar is empty, a red-coloured segment will appear in the population bar. Each red segment removes 1 star from your production. You cannot gain negative stars.You can still support Units with red segments.
If your bar fills up with red dots, your production for that city will stop completely. Should you continue to lose population, the bar will get smaller, and you will no longer be able to support as many units.
If you were to regain the population, it would first remove the red segments before creating blue segments again.