How did the doctrine shape the world events in the second half of the 20th century?​

I would guess, The key point of the Doctrine was to separate the influence in which The United States and European powers would have. Europe would have no intervention within the Western Hemisphere and likewise, the United States would not become entangled in European affairs.

Explanation:

special interest groups must step back and let the process work itself out a representative can amend it at several points in the congressional staffers must do homework and report to the floor on what they 've learned

demand is the need and oportunity to buy a given good or service.