MisterJB wrote...
However, many people seem to defend this system. Then why stand against a future more favorable to humans? Who says that, just because humans are in power, the other species will suddenly be destroyed or enslaved?
The same reason the other species were destroyed or enslaved under the asari, salarians, and turians? Humanity isn't anything special with regards to morality, the ability to govern well, etc. Geniuses, idiots.
In international relations theory, hegemonic solutions for peace are almost always a Good Thing. They tend to work better than most other solutions, at any rate, especially when the hegemony is exercised with a modicum of responsibility and a sense of the rule of law (see e.g. Europe post-Napoleon, pre-1848). In simplest terms, restricting the Council's decision-making membership to only the races that are the 'Great Powers', so to speak, of the galaxy, is simply codifying something that's been around in human diplomatic history for centuries. Indeed, the Paragon Council - humans, asari, salarians, turians - would seem to mirror, albeit distantly, the four Great Powers of Europe of the eighteenth century (Great Britain, France, the Habsburg Empire, and Russia, played by the asari, turians, salarians, and humans respectively, although the similes really don't go very far).
Single-hegemon systems
can work, yes. Look at the history of East Asia, for instance, which effectively revolved around the Chinese empire for two millennia as a single hegemon with no real rivals. The extent to which this system was able to satisfy all powers' security needs obviously varied from period to period, but it never went out of whack and destroyed itself (as the European "balance of power" system did in the late eighteenth century). But for humanity to play the Chinese role, it would have to be able to possess the kind of power that would make it a single hegemon. Realistically, there's no chance in hell that it can do that, even in the MEverse, which accelerated human technological and military development to a rather surprising degree. You can't be King S*** when you don't even have the second largest space navy in the galaxy. For a human-hegemonic galactic system to work, you'd need something like
Star Wars, where humanity easily makes up a plurality (if not an outright majority) of the population of the civilized galaxy.
As things are, I have only played a very few Renegade Sheps with human-run Councils, and even those are for the variety, not the role-playing plausibility. I just can't seriously think that replacing the Council will work out in the long run. It's just too much of a gross overreach.