Scientific disciplines build on social structures, such as scholarly associations and scholarly journals, that facilitate the formation of communities of specialists. Analyses of such social structures can thus also be used to shed light on the morphogenesis of scientific specializations. The authors analyze how two journals of the American Educational Research Association, the Review of Educational Research and the American Educational Research Journal, organized communication around education in the period between 1931 and 2014. The authors focus on three interrelated aspects: (a) the changing structures of authority and authorship, (b) the national-versus-global orientation of these journals and of the association, and (c) the features o...