Universal Alliance
After the fall of the First Intergalactic Empire, at the end of the Internal Civil War years, the development of technology (technology? is it technology?) capable of reach other universes led to the formation of an alliance between lots of galaxies and groups that were fighting each other.
This union is called the Universal Alliance and its the government body of the First Universe and, after thousands of years, of the other known universes as well.
It has evolved to form some kind of semi-democratic council, trying to represent all the people known. It's main board of governors is called Universal Alliance Council (UAC) and it's a horizontal collegiated organism with ultimate decisions on big issues regarding all or a big part of the allies.