Before I built a wall I’d ask to know
What I was walling in or walling out,
And to whom I was like to give offense.
Something there is that doesn’t love a wall,
That wants it down.
These famous lines are from American poet Robert Frost’s poem ‘Mending Wall’. Do walls and fences help to retain or limit human relationships? is the central question the poet asks. Like the poet, it is also a question asked by many social scientists concerned about the way cities today are segregated by walls. To learn more, read on...