Diplomatic Transformations after the Rise of Macedon up to the Battle of Chaeronea (338 BC)

Abstract

This study examines the transformations in the Greek diplomatic system following the rise of Philip II of Macedon, tracing developments up to the Battle of Chaeronea in 338 BC. It argues that inter-polis relations shifted away from the traditional principle of balance of power toward a new order shaped by Macedonian hegemony and expansion. The research identifies four interconnected processes underlying this shift: the collapse of the balance among the major Greek city-states (Athens, Sparta, and Thebes) due to successive wars and exhaustion; a growing crisis of diplomatic trust that rendered treaties, truces, and alliances temporary and unreliable; the transformation of embassies and diplomatic missions into instruments of internal political struggle, particularly in Athens, where rhetoric and factional rivalry compromised the neutrality of envoys; and the gradual decline of the concept of polis independence in the face of a more centralized and organized Macedonian model. The study concludes that Macedonian ascendancy was not the product of military force alone, but also resulted from the internal disintegration of the traditional Greek diplomatic system, which Philip II skillfully exploited through negotiation, alliance-building, and intervention in the domestic politics of the city-states. This process culminated in the Congress of Corinth, which formalized the transfer of diplomatic and political leadership from the individual poleis to a centralized Macedonian authority.