As more and more sentient races meet, there is a clear need for a place to civilly discuss and debate if the galaxy is to escape the tragic path of war. Thus, the Galactic Council is created. A place where one day a leader may rise to unify the galaxy under one banner without the need of bloodshed.
The Galactic Council is the vehicle for a diplomatic victory. The council convenes every 30 turns from its establishment, with every race and every one of the independent civilizations voting for a supreme leader. The two most powerful races compete for the title and the candidate to hold the most votes (70% of the total) is elected the supreme leader of the galaxy and achieves a diplomatic victory.
Other races can be asked to grant their vote during an audience, but their consent requires a good deal of effort and bribing.