Martin Luther King
According to a Boston University investigation into academic misconduct, Martin Luther King, Jr. plagiarized portions of his doctoral thesis that summarizes the concepts of God expressed by Paul Tillich and Henry Nelson Wieman. "A committee of scholars at Boston University concluded that Rev. Martin Luther King Jr. plagiarized portions of his doctoral dissertation, completed there in the 1950s." Despite the plagiarism, the BU committee recommended that King's doctoral degree should not be revoked. 
It has been charged that for his "I Have A Dream" speech King plagiarized the 1952 address of Archibald Carey to the Republican National Convention, the similarities being in the reference to the Samuel Francis Smith patriotic hymn "America" in the peroration followed by a listing of geographical locations from which the orator exhorts his audience to "let freedom ring." Many, however, believe that the comparisons are so slightly similar that they do not rise to the level of plagiarism. King's "I Have a Dream" Speech, Carey's Speech, My Country, 'Tis of Thee. 
Russian President Vladimir Putin has been accused of plagiarism by fellows at the Brookings Institution who allege that "[l]arge chunks of Putin's economics dissertation on planning in the natural resources sector were lifted from a management text published by two University of Pittsburgh academics nearly 20 years earlier."