The article argues that some theoretical approaches to international law are of more tangible benefit than others to doctrinal international lawyers, although all at least invite such lawyers to expand their intellectual horizons and to use parts of their brains that they may not have used for some time. It concludes that what ultimately stands to benefit both theoretical and doctrinal international lawyers, as well as international law as an ecumenical whole, is close, mutually respectful and open-minded co-operation between the two groups.