Plain-language explanation.
Diplomacy is the art of conducting international relations through negotiation and communication rather than force. Foreign policy is a government's strategy for dealing with the rest of the world. Diplomats represent their countries abroad, negotiate treaties, gather information, and manage crises. Understanding diplomacy requires grasping both formal diplomatic institutions and the informal dynamics of international negotiation.
Core concepts and standard treatment.
Diplomatic institutions: the Vienna Convention on Diplomatic Relations (1961) — the legal framework governing diplomatic missions; embassies, high commissions, and consulates; diplomatic immunity and persona non grata; bilateral vs. multilateral diplomacy. Foreign policy-making: the foreign policy executive (heads of state and government, foreign ministers, national security councils); bureaucratic politics (Allison's "Essence of Decision" — three models: rational actor, organisational process, governmental politics); and domestic political constraints (public opinion, legislature, interest groups, diaspora communities). Intelligence and information: the role of diplomatic reporting cables (Wikileaks and the exposure of candid diplomatic assessments), intelligence community input, and think tanks in foreign policy deliberation.
Deeper theory, debates and edge cases.
Negotiation theory and diplomacy: Fisher and Ury's "Getting to Yes" — principled negotiation (focus on interests not positions, invent options for mutual gain, use objective criteria); BATNA (Best Alternative to a Negotiated Agreement — negotiation leverage); integrative vs. distributive bargaining. Coercive diplomacy: compellence (forcing a change of behaviour) vs. deterrence (preventing unwanted behaviour); signalling credibility; red lines and their credibility; the role of sanctions — comprehensive (Cuba, Iran, Russia) and targeted/smart sanctions (asset freezes, travel bans, financial sector restrictions). Public diplomacy and soft power: broadcasting (BBC World Service, Al Jazeera, RT, Voice of America), cultural diplomacy (British Council, Goethe-Institut, Confucius Institutes), exchange programmes, and digital diplomacy (governments' use of social media in foreign policy communication — "twiplomacy").
How it is applied in practice.
Contemporary diplomatic challenges: the multilateral system under stress — reform of the UN Security Council (P5 veto, representation of Global South), declining multilateralism, and the rise of minilateral groups (G7, G20, QUAD, AUKUS). Economic diplomacy: investment screening (CFIUS in the US, NSIB in the UK), export controls (semiconductor restrictions), sanctions as foreign policy instruments (financial interdependence as a weapon — SWIFT exclusions, dollar weaponisation). Crisis diplomacy: back-channel communications in crises (Kennedy-Khrushchev correspondence during the Cuban Missile Crisis); hotlines, confidence-building measures (CBMs), and risk reduction centres. Digital disruption of diplomacy: cyber operations short of war (espionage, sabotage, election interference), norms for responsible state behaviour in cyberspace, and multi-stakeholder internet governance vs. state-led "splinternet".