This volume is a collection of the lectures and discussions at an international colloquium organized by Unesco on the theme of Science and Synthesis to mark the occasion of the 10th anniversary of the death of both Einstein and Teilhard de Chardin, also the 50th anniversary of the theory of general relativity. Despite the great gulf which lies between the work of Einstein and Teilhard de Chardin, the coincidence in the dates provided an opportunity to examine the urge towards a synthesis of the scientific and philosophical approaches which lies at the very heart of the work of these two great...