Michael Doyle, “Thucydides: A Realist?,” in Hegemonic Rivalry, eds. Barry Strauss and R. Ned Lebow (Boulder, CO: Westview, 1991). Reprinted in the Norton Critical Edition of The Peloponnesian War: Thucydides, ed. and trans. Walter Blanco (New York: W.W. Norton, 1998).