Summit diplomacy refers to the practice of conducting negotiations or political dialogue at the level of heads of state or government, bypassing or supplementing the work of foreign ministries and resident ambassadors. The term gained currency after World War II, particularly to describe Cold War-era encounters between U.S. and Soviet leaders, such as the Geneva Summit of 1955 and the Reykjavík Summit of 1986 between Ronald Reagan and Mikhail Gorbachev.
Summits can be bilateral (e.g., a U.S.–China presidential meeting), plurilateral (e.g., the G7 or G20), or institutional (e.g., the annual European Council or BRICS summits). They serve several functions: ratifying agreements pre-cooked by negotiators (so-called sherpa work), breaking deadlocks that lower-level officials cannot resolve, signaling alignment or rapprochement, and generating domestic political capital.
Critics, including career diplomat George Ball and historian David Reynolds, have argued that summits risk personalizing foreign policy, exposing leaders to last-minute concessions, and producing communiqués that paper over substantive disagreement. Proponents counter that only principals can authorize certain trade-offs and that face-to-face meetings build trust difficult to replicate through cables.
Key features of modern summit diplomacy include extensive advance work by sherpas and sous-sherpas (notably in the G7/G20 process), tightly choreographed joint statements, and sideline bilaterals. The rise of megaphone diplomacy via social media has further changed the dynamic, as leaders sometimes negotiate or posture in public during summit weeks.
For practitioners, summit diplomacy is best understood as one instrument among many: effective when paired with thorough preparation, realistic expectations, and follow-through by working-level officials, and counterproductive when used primarily for optics.
Example
At the 2018 Singapore Summit, U.S. President Donald Trump and North Korean leader Kim Jong Un met face-to-face to discuss denuclearization of the Korean Peninsula.