Who were the major powers in the Cold War?
The U.S.S.R. (Union of Soviet Socialist Republics), representing
communism and socialism, and the U.S.A (United States of America),
representing democracy and capitalism. These two countries were the
"leaders", per se, of two opposing organisations: The Warsaw Pact,
and NATO, respectively. This is incomplete. I highly recommend
finding a better answer. I personally suggest either Wikipedia
(www.wikipedia.org) or Google (www.google.com).