This is a fairly short PowerPoint that gets right to the heart of communism, socialism, and capitalism, which is vital to understanding the ideology of the Cold War. This could easily be modified to fit into earlier eras as well, but it does include a couple thoughts about the failure of communism.
This is not meant to be all-inclusive and does not even talk about the Soviet Union. This just focuses on the basic definitions.
The end prompts discussion by linking to an NPR news story about NBA player Steve Nash and how his style of play can be compared to socialism.