Peace and Prosperity

… has garnered a wide reputation for hosting lavish feasts. The gatherings are known for spectacular performances by members of the Alyssum Magnetar, exotic food and drink, as well as philosophical and ethical discussions. Here friendships are formed, business deals are struck and old grievances are forgiven. … ability to unite such disparate individuals lays a solid foundation for our future prosperity.

The command below will trigger the "Peace and Prosperity" event in Stellaris:

When this event fires, you can choose between the following option:

• We are stronger together.
  • Gain modifier: Population United