This question works for any sort of Apocalyptic scenario, but regardless zombies or not eventually small pockets of humanity would be the only ones left. I think We're Alive is close to this point seeing as (from a broad perspective) things have gotten calmer and more routine, the dust has settled if you will. The survivors left in the story have carved out a place for themselves (in some cases literally) in this dystopian world that they all now call home. BUT! Humans are still humans, the same self-destructive species we were before the systems of the world crumbled into oblivion, and at this point most of the humans left are either self serving groups led by Tyrannical individuals (such as Gatekeeper, Marcus, and we don't have enough information on Durai or the Mallers and what they are doing to really place him in this category.) Either that of your on your own (yes the Tower is a self-serving group although not led by Tyranny and or corruption...yet,) and any group that doesn't fall into the standard self-serving hierarchical category are most likely Nomadic by nature of those who make up the group. But even with the human races numbers dwindling more and more these pockets of humanity still war with each other.
So my question is do YOU think that the human race will still ultimately be the cause of its own downfall? Or do you think that the human race would survive long enough regain a place on this planet again? I know we would all like to believe the latter but I think the lesser is much more likely.
And if humanity did survive long enough do you think that the governing ways that we are oppressed by today would be attempted again? OR! Do you think that more people would prefer living their lives in an Anarchistic "Free For All" anything goes AS LONG AS you let it go type of world/society and if so do you think that they would immediately forcefully oppose whatever governments were being built?