Social Science

This science increases the Population Limit, which is the highest population level you can have on each planet. If your Hydroponic Farms are not increasing your population (shows +0), then you will need to research more Social Science to add an extra level to your population limit, thus allowing your population to grow again.

At the 03:00 GMT Daily Update (02:00 GMT during daylight saving), if any of your planets have a population six or more levels below your Social Science Level, one will randomly gain Spontaneous Growth, when that planet’s Population will instantly be increased by one level.