If like me you are following unfolding events in the Arab world with a mixture of astonishment and some apprehension about the future you may want to look at The Economist’s video graph to see where the next revolution could occur. Dubbed the Shoethrower’s Index, after one Iraqi journalist who threw shoes at an outgoing American President who had ordered an invasion of his country, the index looks at a number of factors, including youth unemployment, poverty and inequalities between rich and poor. The results contain no surprises but watch out for Mauritania, which is country that has not received much attention over here.