Pt. I. Overview. Some organizing questions -- Research perspectives -- pt. II. Two parties, one issue. Elmtree House Analytical models and empirical results -- Settling out of court -- The role of time -- Acquisitions and mergers -- Third-party intervention -- Advice for negotiators -- pt. III. Two parties, many issues. AMPO versus City -- Tradeoffs and concessions -- The Panama Canal negotiations -- Risk sharing and insecure contracts -- Camp David negotiations -- Mediation of conflicts -- Arbitration of disputes -- pt. IV. Many parties, many issues. Coalition analysis -- The law of the sea -- Fair division -- Willingness to pay for a public good -- Environmental conflict resolution -- The mariner space probes -- Voting -- pt. V. General concerns. Getting people to communicate -- Ethical and moral issues -- Epilogue