Abstract
Basic science is an inherently international activity. Its principal goal is the production of new knowledge which is evaluated according to universal standards. In terms of membership and goals scientific communities have been international since their emergence during the seventeenth century. Basic science today consists of hundreds of research problem areas in which groups of scientists study similar problems and exchange information across national boundaries. International scientific cooperation occurs on several levels ranging from informal communication between individual researchers to multilateral agreements between governments and intergovernmental organizations (IGOs).