Relaxation of tensions between rivals. A period of the Cold War that commenced in the early 1960s after the Cuban missile crisis and was reinforced by the initiatives of US President Nixon and his National Security Advisor, Henry Kissinger
Richard Devetak, Anthony Burke, Jim George, An introduction to International Relations (2nd Ed), Glossary of Terms, ISBN 978-1-107-60000-3, Cambridge University Press, NY, USA 2012. http://www.cambridge.edu.au/downloads/academic/Int roduction_to_International_Relations_review_copy.p df, (IntRltn - Amer) {935}