John Sutter: A wall meant to separate Sunni and Shia neighbors in Iraq has united people against the U.S. military. He says the wall controversy has become a symbol of local discontent over the American military security strategy. Historians have lamented the relative ineffectiveness of walls as security devices compared to expectations they’re freighted with. Sutter says walls more deeply divide already divided people and give rise to violence instead of quelling it. Walls served other purposes as tolls, to collect money and control, not prevent, trade.”]
Source: https://www.csoonline.com/article/2135634/physical-security-and-politics–will-walls-work-.html