Forget about all the topics you mentioned and study philosophy. It encompasses all of them so in a way you're studying multiple disciplines, ie. have your cake and eat it too. Second, philosophy can go wherever you want it to go, where as in the other fields you mentioned there is a high level of dogmatic norms that you have to stick to if you want to be published or rise to any sort of prominence. Third, social sciences, economics and the like are fields that want to do empirical science and copy physics, but fail at it miserably.

Often a Noble prize in economics detracts from the world instead of adding to it.