Zoos are becoming facsimiles - or perhaps caricatures - of how animals once were in their natural habitat. If the right policies toward nature were pursued we would need no zoos at all.
I think the Cold War works as a great analogy or simile for different kinds of conflict. It's funny when you look back at it it's one of the last times that the boundaries were clear. Now as we see on 'Homeland ' there are no clear boundaries and enemies.