| Author Name | Profession | Nationality |
| R. D. Laing | Psychologist | Scottish |
| R. Kelly | Musician | American |
| R. Lee Ermey | Soldier | American |
| Rachael Leigh | ||
| Rachel Field | Novelist | American |
| Radclyffe Hall | Poet | English |
| Rafer Johnson | Athlete | American |
| Rafik Hariri | Statesman | Lebanese |
| Rahm Emanuel | Politician | American |
| Rainer W. Fassbinder | ||
| Raj Kapoor | Actor | Indian |
| Rajiv Gandhi | Statesman | Indian |
| Ralph Abernathy | Activist | American |
| Ralph Allen | Politician | British |
| Ralph Bakshi | Director | American |
| Ralph Ellison | Author | American |
| Ralph Erskine | Architect | English |
| Ralph Fiennes | Actor | British |
| Ralph Kiner | Athlete | American |
| Ralph Lauren | Designer | American |
| Ralph Waldo Emerson | Poet | American |
| Ram Dass | Psychologist | American |
| Ramman Kenoun | ||
| Randall Jarrell | Poet | American |
| Randy Bachman | Musician | Canadian |
| Randy Castillo | Musician | American |
| Randy Forbes | Politician | American |
| Randy Harrison | Actor | American |
| Randy Jackson | Musician | American |
| Randy Johnson | Athlete | American |
| Ranulph Fiennes | Explorer | British |
| Rashida Jones | Actress | American |
| Raul Labrador | Politician | American |
| Ray Dalio | Businessman | American |
| Ray Davies | Musician | English |
| Ray Evans | Musician | American |
| Ray Floyd | Athlete | American |
| Ray Harryhausen | Director | American |
| Ray Lamontagne | Musician | American |
| Ray Stannard Baker | Journalist | American |
| Ray William Johnson | Actor | American |
| Raymond E. Feist | Author | American |
| Raymond Floyd | Athlete | American |
| Rebecca Hall | Actress | English |
| Rebecca Harding Davis | Author | American |
| Rebecca Latimer Felton | Writer | American |
| Recep Tayyip Erdogan | Politician | Turkish |
| Red Adair | Celebrity | American |
| Red Barber | Celebrity | American |
| Reed Hastings | Businessman | American |
| Reem Acra | Designer | Lebanese |
| Reeve Carney | Actor | American |
| Reggie Jackson | Athlete | American |
| Regina King | Actress | American |
| Renata Adler | Journalist | Italian |
| Rene Cassin | Judge | French |
| Rene Daumal | Writer | French |
| Rene Descartes | Mathematician | French |
| Renee Ellmers | Politician | American |
| Renee Fleming | Musician | American |
| Renny Harlin | Director | Finnish |
| Rex Harrison | ||
| Rhonda Cator | Athlete | |
| Rhys Ifans | Actor | Welsh |
| Rian Johnson | Writer | American |
| Ric Flair | Celebrity | American |
| Ric Keller | Politician | American |
| Ricardo Lagos | Politician | Chilean |
| Riccardo Giacconi | Scientist | American |
| Rich Galen | ||
| Richard Adams | Clergyman | English |
| Richard Aldington | Writer | English |
| Richard Bach | Novelist | American |
| Richard Baker | Politician | American |
| Richard Barnfield | Poet | English |
| Richard Baxter | Clergyman | English |
| Richard Carlson | Author | American |
| Richard Cecil | Clergyman | English |
| Richard D. James | Musician | English |
| Richard Dawkins | Scientist | English |
| Richard Dawson | Actor | English |
| Richard Eberhart | Poet | American |
| Richard Engel | Journalist | American |
| Richard Ernst | Scientist | Swiss |
| Richard Eyre | Director | British |
| Richard Farnsworth | Actor | American |
| Richard Fleeshman | Actor | English |
| Richard Ford | Author | American |
| Richard Gere | Actor | American |
| Richard H. Baker | Politician | American |
| Richard H. Davis | ||
| Richard Hammond | Entertainer | English |
| Richard Hanna | Politician | |
| Richard Harding Davis | Journalist | American |
| Richard Harris | Actor | Irish |
| Richard Harris Barham | Comedian | English |
| Richard Hatch | Actor | American |
| Richard Henry Dana, Jr. | Lawyer | American |
| Richard Henry Lee | Politician | American |
| Richard J. Daley | Politician | American |
| Richard Jefferson | Athlete | American |
| Richard Jenkins | Actor | American |
| Richard Jewell | Celebrity | American |
| Richard Karn | Actor | American |
| Richard Kern | ||
| Richard Kerry | Diplomat | American |
| Richard Kiel | Actor | American |
| Richard King | Director | American |
| Richard L. Evans | Clergyman | American |
| Richard Lagravenese | Writer | American |
| Richard Lamm | Politician | American |
| Richard Land | ||
| Richard Le Gallienne | Poet | English |
| Richard Leakey | Environmentalist | Kenyan |
| Richard M. Daley | Politician | American |
| Richard M. Devos | Businessman | American |
| Richard Mentor Johnson | Politician | American |
| Richard Owen Cambridge | Poet | British |
| Richard P. Feynman | Physicist | American |
| Richard V. Allen | Public Servant | American |
| Richie Allen | Athlete | American |
| Rick Allen | Musician | |
| Rick Baker | Inventor | American |
| Rick Barry | Athlete | American |
| Rick Danko | Musician | Canadian |
| Rick Dees | Entertainer | American |
| Rick Derringer | Musician | American |
| Rick James | Musician | American |
| Rick Kaplan | Businessman | American |
| Rick Larsen | Politician | American |
| Ricki Lake | Entertainer | American |
| Rickie Lee Jones | Musician | American |
| Ricky Gervais | Writer | English |
| Riley Keough | Actress | American |
| Rima Fakih | Clergyman | American |
| Ring Lardner | Comedian | American |
| Rio Ferdinand | Athlete | English |
| Roald Amundsen | Explorer | Norwegian |
| Roald Dahl | Novelist | British |
| Rob Glaser | Businessman | American |
| Rob James Collier | Actor | British |
| Rob Kardashian | Celebrity | American |
| Robbie Keane | Athlete | Irish |
| Robert A. Dahl | Writer | American |
| Robert Adams | Photographer | American |
| Robert Adamson | Philosopher | Scottish |
| Robert Aldrich | Director | American |
| Robert Altman | Director | American |
| Robert B. Laughlin | Physicist | American |
| Robert Baden Powell | Soldier | English |
| Robert Baldwin | Politician | Canadian |
| Robert Ballard | Scientist | American |
| Robert Barany | Scientist | Austrian |
| Robert Barclay | Writer | Scottish |
| Robert Barnes | Celebrity | English |
| Robert Cailliau | Scientist | Belgian |
| Robert Capa | Photographer | American |
| Robert Carlyle | Director | Scottish |
| Robert Caro | Writer | American |
| Robert Casey | Politician | American |
| Robert Cecil | Public Servant | British |
| Robert D. Kaplan | Journalist | American |
| Robert Delaunay | Artist | French |
| Robert E. Lee | Soldier | American |
| Robert Emmet | Activist | Irish |
| Robert Englund | Actor | American |
| Robert Evans | Director | American |
| Robert F. Ellsworth | Diplomat | American |
| Robert Farrar Capon | ||
| Robert Fisk | Journalist | British |
| Robert Fitzgerald | Author | American |
| Robert G. Allen | Politician | American |
| Robert Gibbs | Public Servant | American |
| Robert Green Ingersoll | Lawyer | American |
| Robert Half | Businessman | American |
| Robert Hall | Clergyman | English |
| Robert Hamer | Director | British |
| Robert Hass | Poet | American |
| Robert Iger | Businessman | American |
| Robert Iler | Actor | American |
| Robert Indiana | Artist | American |
| Robert Irvine | Chef | English |
| Robert J. Flaherty | Director | |
| Robert Jackson | Statesman | American |
| Robert Jarvik | Inventor | American |
| Robert Jenkins | Soldier | English |
| Robert Johnson | Psychologist | American |
| Robert Kagan | Writer | American |
| Robert Kennedy | Politician | American |
| Robert Lanza | Scientist | American |
| Robert Laurent | Sculptor | American |
| Robert M. Gates | Politician | American |
| Robert M. La Follette | Politician | American |
| Robert Mark Kamen | Writer | American |
| Robert N. Lee | Writer | American |
| Robert T. Bakker | Scientist | American |
| Robert. L. Ehrlich | Politician | American |
| Roberta Flack | Musician | American |
| Roberto Calvi | Businessman | Italian |
| Roberto Cavalli | ||
| Robertson Davies | Novelist | Canadian |
| Robin Day | Journalist | British |
| Robin Gibb | Musician | English |
| Robin Givens | Actress | American |
| Robin Leach | Writer | English |
| Robinson Jeffers | Poet | American |
| Robyn Carr | Author | American |
| Robyn Davidson | Writer | Australian |
| Rockwell Kent | Artist | American |
| Rod Carew | Athlete | Panamanian |
| Rod Laver | Athlete | Australian |
| Rodney Alexander | Politician | American |
| Rodney Carrington | Comedian | American |
| Rodney Dangerfield | Comedian | American |
| Rodney King | Celebrity | American |
| Roger Ailes | Businessman | American |
| Roger Babson | Educator | American |
| Roger Bacon | Philosopher | English |
| Roger Bannister | Athlete | British |
| Roger Caras | Activist | American |
| Roger Daltrey | Musician | English |
| Roger Ebert | Critic | American |
| Roger Federer | Athlete | Swiss |
| Roger Kahn | Writer | American |
| Roger Nash Baldwin | Activist | American |
| Roland Allen | Clergyman | English |
| Roland Barthes | Critic | French |
| Roland Emmerich | Director | German |
| Roland Gift | Actor | British |
| Roland Joffe | Director | English |
| Romain Gary | Novelist | Russian |
| Roman Jakobson | Scientist | Russian |
| Romeo Leblanc | Politician | Canadian |
| Ron Carter | Musician | American |
| Ron Darling | Athlete | American |
| Ron Davies | Politician | Welsh |
| Ron Dellums | ||
| Ron Fairly | Athlete | American |
| Ron Glass | Actor | American |
| Ron Jaworski | Athlete | American |
| Ron Johnson | Politician | Canadian |
| Ron Kind | Politician | American |
| Rona Barrett | Journalist | American |
| Rona Jaffe | Novelist | American |
| Ronald Firbank | Novelist | English |
| Ronald Fisher | Mathematician | English |
| Ronald Harwood | Playwright | South African |
| Ronald Isley | Artist | American |
| Ronnie Barker | Comedian | English |
| Rosa Delauro | Politician | American |
| Rosabeth Moss Kanter | Businesswoman | American |
| Rosalia De Castro | ||
| Rosalynn Carter | First Lady | American |
| Rosanne Cash | Musician | American |
| Rosario Dawson | Actress | American |
| Roscoe Bartlett | Politician | American |
| Rose Kennedy | Author | American |
| Rose Wilder Lane | Journalist | American |
| Roseanne Barr | Actress | American |
| Rosemarie Dewitt | Actress | American |
| Roy Acuff | Musician | American |
| Roy Barnes | Politician | American |
| Roy Campanella | Athlete | American |
| Roy Castle | Musician | English |
| Roy Evans | Athlete | English |
| Roy Harper | Musician | English |
| Roy Hattersley | Statesman | British |
| Roy Jenkins | Politician | British |
| Roy Keane | Athlete | Irish |
| Ruben Dario | Poet | Nicaraguan |
| Ruby Dee | Actress | American |
| Rudolf Carnap | Philosopher | German |
| Rudy Giuliani | Politician | American |
| Rufus Jones | Writer | American |
| Rufus King | Lawyer | American |
| Rupert Everett | Actor | English |
| Russ Carnahan | Politician | American |
| Russ Feingold | Politician | American |
| Russell Baker | Journalist | American |
| Russell Banks | Author | American |
| Russell Johnson | Actor | American |
| Rutger Hauer | Actor | Dutch |
| Ruth Bader Ginsburg | Judge | American |
| Ruth Ellis | Criminal | British |
| Ruth First | Activist | South African |
| Ruth Handler | Businesswoman | American |
| Ruth St. Denis | Dancer | American |
| Ryan Adams | Musician | American |
| Ryan Cabrera | Musician | American |
| Ryan Giggs | Athlete | Welsh |
| Ryan Hall | Athlete | American |
| Ryszard Kapuscinski | Journalist | Polish |
“My guess is that nuclear weapons will be used sometime in the next hundred years, but that their use is much more likely to be small and limited than widespread and unconstrained.”