Contemporary international politics embody a tension between formal eq
uality and de facto inequality. States recognize each other as soverei
gn equals, yet the strong still push around the weak. Among the struct
ures that reflect this tension are informal empires. The dominant assu
mptions in mainstream international relations theory, materialism and
rationalism, privilege the formal equality of states in informal empir
es a priori: materialism by assuming that authority relations cannot e
xist between sovereign states; rationalism by assuming that states are
sovereign over their own interests. A constructivist approach allows
one to explore the hypothesis that transnational authority structures
construct state identities and interests. An empirical analysis of the
Soviet-East German relationship supports this hypothesis, which raise
s questions about the emerging study of international governance.