A sentence or two can, at times, say more than some essays or doctoral theses. This is one of those instances. As the campaign for the first round of voting in the French presidential election entered the home straight, American Joseph Stiglitz felt constrained to take to Twitter: “I wish Marine Le Pen would stop acting as if I agree with her and her (political, economic and monetary) ideas”, raising a more sinister note when he went on: “Apart from anything else, I am Jewish and my...