I was actually thinking about centuries, not just decades, referring, mostly, to the early formation of ancient societies. It is not a fast process by any means.
In modern times the process is, of course, can go much faster than in 2000BC, because everyone can see a template of a working system before their eyes in the form of existing countries, so they can just copy-paste the basic law / organizational structure instead of slowly inventing them.
In modern times the process is, of course, can go much faster than in 2000BC, because everyone can see a template of a working system before their eyes in the form of existing countries, so they can just copy-paste the basic law / organizational structure instead of slowly inventing them.