Before and after world war ii the united states had many ties with europe based on the map what is the most likely reason the united states did not want communisim to spread farther west

It would interfere with their trade alliances. 

Communism leads to the government taking control of resources and industry. If it spread into areas the US did business, they could lose the ability to control resources and trade. This would eventually impact our political power and any military advantages the US had in Europe.

The exchange of foods between the new and old worlds