The categorization of states according to size has long been a part of world politics. Rothstein notes, for example, that the formalization of the categories of great and small powers occurred as a result of the signing of the Treaty of Chaumont in 1817. Recently, the concept of size has received an increasing amount of attention as a factor affecting foreign policy. One manifestation of this is the renewed interest in die foreign policy behavior of small states. In his pre-theory of foreign policy, Rosenau includes size as one of three “genotypic” variables assumed to exert a major influence on foreign policy. In addition, empirical studies have shown size to be an important factor underlying variations in the international behavior of nation-states.