After the University of Mississippi admitted James Meredith in 1962, the federal government sent marshals to O keep additional African Americans from attending college there.
O protect white students caught in the middle of the controversy.
o keep him from attending class until the Supreme Court could rule.
O protect him from white students who were rioting in response.

first paragraph (and busy all the night ,with a silence deep and white )

d.prevent the spread of communism outside of eastern europe.

dylan has written many enduring songs and he has received several awards for his musical achievement;  

any written work with artistic value can be considered literature; especially if such work is publicly recognized, and has had importance and endurance among people; whether is poetry or fiction or drama or even criticism, since it's the transcendence and representation of a culture, language or people in a period of time to more people, using letters (words), regardless the subject.

the nobel prize in literature is given to authors from any country based on a body of work as a whole that inspires and nurses the life of humanity.  

and the work of bob dylan matches that description, therefore is well deserved since he'd created new poetic expressions within the american song tradition, that has inspired and influenced the lives of many people, not only withing the united stated but worldwide as well.