This collection of essays is divided into five sections, covering the following subjects: International Organizations; State Activities in the Economic Field; Protection of Investments; and Settlement of International Economic Disputes and War. They reflect Seidl-Hohenveldern's insights, resulting from more than 40 years of experience as an international lawyer. He has acted as an arbitrator in many ICC and ICSID arbitrations, and has fulfilled a number of functions within international organizations, inter alia as a member of UNRWA's Special Panel of Adjudicators (1983-1991), and as President of the UN Conference on Succession of State in respect of State Property, Archives and Debts.