
Sadly, walls are built
for much the same set of reasons as ancient walls. We have defense walls
against external threats of terrorism and infiltration by insurgents. There are
walls that separate conflicting cultures and religions, walls that establish
ownership of land, barriers that regulate trade, and fences that restrict
migration of civilians. The attributes of walls have changed from earthwork,
bricks and masonry to sophisticated structures that include concrete, razor
wire, sensors, personnel, dogs, infrared equipment, patrol vehicles, drones,
helicopters, planes and satellites. There are additional invisible walls made
of legal and digital barriers to restrict the movement of goods and people, and maritime
systems to detect unauthorized boats.
Like ancient
walls, modern ‘security walls’ are only partially successful in accomplishing
their goals. No physical barrier can provide effective protection against
homegrown terrorists and modern weapons. No fortification can stop migrants who
arrive by air and sea. No wall will reduce the drug flow when most of it
crosses the border through legal entry points. More than ever before, walls
today are politically motivated, reflecting signaling behavior by governments
who wish to appear tough on immigration, and serving the interests of defense
industries that stand to benefit from the projects. Economic literature
overwhelmingly suggests that policies of more open borders, with less
restrictive migration and trade, benefit domestic citizens more than walls.
Economic policies are also more effective than walls in dealing with illegal
trade and trafficking, while diplomacy is more effective than walls in
addressing security. Ignoring rational economic thinking over populist politics
comes at a price, a loss in well-being.
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