Around the globe, this is the summer of middle-class discontent, particularly in the developing world. From Istanbul to Rio de Janeiro, from Bulgaria to Bosnia, the pent-up frustrations of an engaged citizenry are being triggered by a series of seemingly disparate events. Thousands of protestors, including an outpouring of middle-class citizens, are expected in Cairo’s Tarhrir Square this Sunday. They return to the touchstone plaza of the Arab Spring in a nation that exchanged a dictator for what many Egyptians now see as a new government unwilling or unable to fix a corrupt bureaucracy and inefficient economy.