The Global Security Institute is dedicated to strengthening international cooperation and security based on the rule of law, with a particular focus on nuclear arms control, non-proliferation and disarmament. GSI was founded by Senator Alan Cranston whose insight that nuclear weapons are impractical, unacceptably risky, and unworthy of civilization continues to inspire GSI's efforts to contribute to a safer world. GSI has developed an exceptional team that includes former heads of state and government, distinguished diplomats, effective politicians, committed celebrities, religious leaders, Nobel Peace Laureates, disarmament and legal experts, and concerned citizens.

The Global Security Institute works through four results oriented programs.

*"Middle powers" are politically and economically significant countries that have renounced nuclear arms. They serve as a bridge to influence nuclear armed countries to keep treaty promises and reduce nuclear dangers. MPI works closely with several "middle power" governments including Brazil, Egypt, Ireland, Mexico, New Zealand, South Africa, and Sweden.