Vergil, but with some... points to be made.
Surely, after Mundus' defeat, the power structure of the world would be destroyed; add the whole collapsing-Limbo thing, and you're in for a great zombie demonic apocalypse... In a situation like this, the result would probably be the elimination of those rules that ensure a civilized convivence, and that had been the product of centuries of philosophical and political thought: democracy, rights, and so on. (even though in this world, democracy is just a facade, the principle still holds)
The outcome would probably be the creation of little groups and communities, each with its own rules, groups that would come to fight each other for one reason or the other. (I'm being totally influenced by The Walking Dead here.. but I don't think that a similar outcome would be so improbable in a situation like this.)
In a situation like this, humans would need a strong guide, someone to help them face the "demon emergency".
Then they'll have to rebuild the institutions they need: the states and the international community.
Now, this is not an easy process: democracy is not for everyone. One must be educated to democracy, beacuse the democratic structure is essentially fragile: the major problem of democracy is, if anyone is allowed to speak his/her mind, how can we tell someone "No, you can't say these things", even if this someone is Hitler? (basic problems of political philosophy here)
The point is, democratic culture is not so easy to cultivate, we need to learn how to make it work.
So, how does Vergil fit in all of this?
Let me use Vergil's own metaphor: humans are like children.
Children need parents to educate them and to protect them from harm. Humans are children in the sense that they are facing an enemy (demons) who is much stronger (at least physically) than them. And they need protection from themselves in the sense that they need to be taught how to control their worst instincts (they DO have them: think about men who beat their wives, just to make an immediately comprehensible example).
But, at some points, parents MUST step aside and let them grow up.
The point is, Vergil is right in saying that humans must be protected, at least for now, but then he'll have to gradually let them walk on their own. I don't honestly know if this is exactly what he had in mind, but I think that Dante's solution (let them do whatever they want because they must be free) is worse.