Brian Martin Give a theorist a topic to study, and the result may well spin off in directions that are of interest only to other theorists.
Anarchism is one such topic.
One good example of such work is For and Against the State . It is actually a good selection of treatments, including quite a vigorous difference of opinion and perspective. It is also a good illustration of how irrelevant most of this sort of philosophical work is for anyone besides philosophers. The book has 13 chapters by 13 contributors. All are men, almost all are philosophy academics and all but one are based in the United States, Canada or Britain.