Why do you think president truman believed that poverty and suffering created conditons in which communism might spread

President Truman trusted that destitution and enduring make conditions in which socialism may spread since individuals who are poor will probably like the possibility of socialism than individuals who are fortunate. 
Socialism trusts that individuals ought not by any means possess any genuine private property. Communists surmise that there ought not to be rich individuals and needy individuals. Rather, socialism guarantees that everybody will be equivalent.