It helps people keep going in life
Two of the main reasons for Truman's policy of containment during the Cold War were that the USSR was trying to rapidly expand, and that eliminating communism where it already existed was extremely unlikely. It was considered a very effective policy originally but then was viewed with skepticism when Vietnam hit.
They were both presidents
Two things that increased american interchanges in the late 1800s were "b. the telegraph and telephone," since both of these creations significantly accelerated correspondence and made it more productive.
