The correct spelling is containment instead of containment. Containment is the process of keeping something that is dangerous or damaging under control. It is the action of stopping the growth of a hostile influence.
Containtment. They wanted to prevent the spread of Soviet influence in Europe.
In their eyes communism was EVIL. (With Stalin that was true.) They felt they must help the European nations and African nations get repaired and restored to good strong economies so they could fend off the communists. There plans and ideas did help the Europeans.