Residents do not require full happiness to advance to the next population tier, only their basic needs must be fulfilled. Happy residents pay higher taxes, are less likely to riot and can organise festivals that provide useful buffs to the islands' residents, production, or attractiveness.
The happiness levels are influenced by five factors:
- Island peace
- Working conditions
People want to be supplied with luxury goods like schnapps and have access to certain public buildings like church. Fulfilling all luxury needs grants +20 happiness. When no luxury need is fulfilled people are dissatisfied and happiness is lowered by 20.
For more details see: needs.
It is possible to exploit your people making them work harder which negatively impacts their happiness (up to -40). You can also shorten their working time to make them happy (up to +40). Working conditions are specific for every production building, but overall happiness change is applied to a specific tier basing on how much of its workforce is being exploited. Overall happiness change is based on three factors: applied working conditions, amount of workforce being employed in the affected factories, total workforce pool of the island. More info about Working Conditions, as well as the specific formula for calculating overall happiness change of a specific tier, can be found on the specific page.
Heavy industry factories generate pollution which lowers both population's happiness and city attractiveness. Having no heavy industry factories increases inhabitants' happiness (+5). Every factory, which generates polluton, decreases happiness bonus. When enough factories are built, the pollution factor turns neutral and then negative up to -20.
Newspaper articles can influence the happiness of your people. Negative articles about fires or wars lower population's happiness (-5). Positive articles about better diplomatic relations or positive credit balance increase the happiness (+5). Some articles can also be neutral. It is possible to use influence to change the impact of articles but using too much propaganda can result in lower happiness and riots.
For more details see: newspapers.
Happy population can organise festivals which last for around 30-35 minutes and have powerful island-wide effects.