Is it possible to build a Roman-style government in modern time or post apocalypse time?
>Caesarposting
Oh how low this board has fallen.
>>2397067
Already happened.
>>2397067
Not in modern times.
The West is the dominant power and, for the important parts of it, stand strongly with the principles of individualism and with the contract theory of government. I'm only saying this because I assume you're talking about the Empire rather than the Republic, which itself was not exactly like the the republics of today, but that at least has a chance of being adapted.
As for post apocalypse, anything is possible when most people are dead.