The Amalgam is a galaxy-wide conglomerate of intelligent species that have the technology to scan their brains; it turns up in several of Greg Egan's short stories ("Glory" and "Riding the Crocodile") and in his novel Incandescence.
This enables them to have back-ups and to travel by information transmission at the speed of light.
Everyone lives peacefully, the technology enables an open society with plenty of freedom for everyone. Strangers are welcomed on any planet.
The individual humans in the stories live until they do not want to continue which is about 10,000 years in subjective time.
The problem is that they have not given up on physical bodies and that they also have children. This issue is not expanded further in the stories, but it is rather unlikely that a human being will only have two children in 10,000 years on average, so exponential population growth should eventually destroy The Amalgam, technology notwithstanding.
Is there anything that I have overlooked or is the Amalgam indeed inconsistent in this respect?