The fact "Discussions of politics often lead to talk about communism and socialism" is illustrated with the story:1. Bob wanted to discuss politics with a friend.2. Bob's friend was older and remembered much 20th century history.3. As Bob and his friend spoke, they discussed the main themes of 20th century politics.4. Bob and his friend were also concerned about the low wages paid to many people.5. Bob and his friend ended up talking about socialism and communism.