This book is the joint work of two friends who have dedicated their lives to peace theory and practice, but also have a love for mathematics. We have advanced degrees; Galtung from University of Oslo 1956, specializing in stochastic theory and relation algebra, Fischer from University of Bern 1968 with linear algebra as specialty. The book brings peace and mathematics closer, as peace mathematics; showing what such concepts as numbers, sets, probability, logic, relations, matrices, graphs, games, systems, calculus, chaos and catastrophe can contribute to peace theory and practice. This is book 16 from TRANSCEND Univiersity Press