I've heard the bunker project tossed around for a while in EA, but I haven't heard anyone talk about what I think is the most likely failure for such a project. I think that if we were to have bunkers where isolated groups live for years on end that the most likely cause of failure would be social strife and poor culture. Getting this right seems harder to me than the logistics of building the bunkers.
Also, consider that in the case where bunker people repopulate the world then they will simultaneously be reseeding the world with the culture of the group then.
I looked quickly, but I can't find much written about the bunker idea. Thoughts?