The English School is noted for its trademark claim that states can form international societies, not just international systems. That is, states can come together over shared common interests to agree on common rules and create institutions to uphold those rules. When asked what sustains such a society, English School theorists offer two main answers. One is pragmatic: States share basic interests in physical security, stable territorial rights, and the keeping of agreements, and international society is the best means to these ends. This is overlaid, however, by an argument about the cultural prerequisites for international society.
Far from seeing culture as complex and contradictory, Martin Wight, one of the school’s founders, held in Systems of States that an international society “will not come into being without a degree of cultural unity among its members.” Modern international society, he argued, had its origins in European civilization, and when decolonization admitted a host of non-Western states, international society had “outrun cultural and moral community.” The idea that pragmatism could only ever sustain a thin social order—and that a common culture was needed to undergird robust bonds, institutions, and practices—focused much of the school’s post-decolonization research on the possibility of international society in a culturally diverse world.