My utopia would be an intergalactic empire that would incorporate dying or struggling species into the empire to help them live and breed, everyone would go through a school system tailored to what they want to be and they would then would that craft for as long as they choose to. All people would be welcomed and each new race would get a high ranking officer in a council of elders that would decide the most important decisions and give the populace a choice on what to do. Religion is whatever you choose to worship and science and religion would be intertwined to prevent useless fighting. The buildings would be cultural and would have no one style, and entertainment would be whatever you can buy or do. Science and technology would be a main focus and would be the driving force of the empire.