Border walls: 'turnkey' answer to threats real and imagined

Montreal (AFP) – Built to keep out migrants, traffickers, or an enemy group, border walls have emerged as a one-size-fits-all response to the vulnerability felt by many societies in today’s globalized world, says an expert on the phenomenon.
Practically non-existent at the end of World War II, by the time the Berlin Wall fell in 1989 the number of border walls across the globe had risen to 11.
That number has since jumped to 70, prompted by an increased sense of insecurity following