Every time I look at a fence, I do not have the question whether it's built to keep things in or out, why are they built at the first place. To me fences symbolizes some kind of differentiation. These fences come in two types. There are visible fences like the ones to demark territories. Then there are invisible ones which we have invented like nationality, religion, financial clout etc.
We all have been on both sides of the fence and we know that none looks good. Then why do we have fences?