Happiness

Happiness is a basic stat that helps boost most other stats such as beakers, hammers, and growth.

The base for happiness is the basic biomes around you, averaged... So if you choose a very happy spot with lots of flowers lets say, you will get a big boost in your happiness.

The full biome list and bonuses are here at the biomes page.

An average happiness for a city is 70% 100% is super awesome!

Several buildings will also boost your happiness.

And some events may lower your happiness such as declaring war.