Stopping the spread of communism was the top priority outlined in "<span>the Truman doctrine," since Truman was one of the US presidents who was in office during the Cold War and wanted to "contain" communism. </span>
Several factors came together. Europe had a population that was on average richer than most other cultures. A very competitive commercial class, ships that were superior than other cultures, developed for the rough North Atlantic, and a number of competitive states rather than a single empire.
