Mayor Andrew Young of Atlanta urged graduates at the University of Notre Dame to become politically aware and volunteer their skills to the needy.
Muir returned to Ithaca College to deliver the commencement address in May 2011 during which he urged graduates to use their voice.
He spoke at the college's May 1998 commencement, urging graduates to use their education as a "bulwark against tyranny".
Students distributed cards urging graduates to protest when Mr. Curtis rose to speak.
The gist of these threats is that unless I resume urging graduates to go forth I had better give up commencement speeches.
Mr. Buchwald, who attended U.S.C. in the 1940's, urged graduates to make the most of their lives.
She acknowledged the protests, receiving applause after urging graduates to consider perspectives different from their own.
Gov. Jim Florio urged graduates of Rutgers University today to actively fight incidents of bias and intolerance.
Mr. Cosby also spoke soberly when he urged graduates to pay back their Federal student loans.
Chief Justice William H. Rehnquist of the Supreme Court urged graduates of Boston University today to value their spare time.