Economist in disagreement shock

Bloomberg has a funny diagram of Paul Krugman’s metaphorical punch-ups with other economists. I think this sort of conflict is a good thing, as it exposes economics as subjective rather than the social physics that many economists pretend it is. Social scientists should disagree, and one of the reasons why the discipline was so bad at foreseeing the crisis is that for many years there was an unhealthy agreement about many basic ideas.