Politicians should think twice about angering the folks who grow their food. This week Argentine leaders are learning what can happen when they run afoul of the agriculture community. A new system of export taxes on soybeans and sunflowers has farmers protesting—erecting some 150 roadblocks that snarled traffic, protesting in the streets, and refusing to release their fruits and vegetables, thereby causing food shortages at markets. As travel writer and Buenos Aires resident Robert Wright points out, “No beef at the grocery store? In Argentina? Hard to believe.”

Uh, guys, a hungry populace does not bode well. Come on, have we learned nothing from the French Revolution?

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