With the issuance of the monroe doctrine, was america a world power? explain your reasoning

Not really.

It wasn't until the Roosevelt Corollary to the Monroe Doctrine a hundred years later that the United States was seen as emerging into status as a world power.

The importance of the Monroe Doctrine is that the United States was going to mostly stay out of the wars in Europe, despite receiving aid from France during the Revolution and having been formerly British.

beowulf is considered an epic poem because it describes the actions of a great warrior.

beowulf is taken into account an epos. in this poem, the main character may be a hero who travels nice distances to prove his strength at not possible odds against supernatural demons and beasts. in the poem, beowulf was a young warrior and he leaves his country to hrothgar, as hrothgar was in a great trouble.