Sprawling space 4x Stellaris’ new expansion, Federations, lets you form a galactic community. It’s an organization that spans the galaxy, and everyone is effectively a member whether they like it or not. (Except if you’re space North Korea, or an empire of machine exterminators or what have you.) Anyways, the end result is basically the galactic senate chamber from the Star Wars prequel movies mixed with the real-world United Nations – various measures are tabled and discussed, with various economic impacts around the galaxy. 

Different voting blocs have different power levels, and eventually an analog of the UN security council can be established. It’s a great maneuver, allowing you to If you’re clever, you can make yourself a permanent member… then you can lower the number of members to one… then, well – you ARE the Senate.

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