In the life of Brian: “What have the Roman’s ever done for us?”
After some game of question and answers :
“All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us?”
“Brought peace.”
“Oh. Peace? Shut up!”
[What Have the Romans Ever Done for Us? - YouTube]
I am not sure that the Roman empire brought everything listed, or rather i am sure he did not.
Some he also did in its own interest, as the roads.
But it brought public order and peace.
Under peaces of empires, people, religions and so live together and must tolerate each others.
And necessary decisions can be taken and implemented.
I know that the rule of empires is harsh and that empires work for the powerful and the rich.
I know that they tend to degenerate, either in states of anarchy, either in dictatorships.
But given the present world, the needs to take harsh decisions to fight the climate change effects, why not an empire, with some guarantees ?