Widely known for the book and miniseries 'Roots' as well as 'The Autobiography of Malcolm X,' Alex Haley was a U.S. writer whose works of historical fiction and reportage depicted generations of African-American lives.
Carl Sagan was probably the most well-known scientist of the 1970s and 1980s. He studied extraterrestrial intelligence, advocated for nuclear disarmament, and co-wrote and hosted 'Cosmos: A Personal Voyage.'
Denise Levertov was an English-born poet, essayist and political activist who wrote matter-of-fact verse on both personal and political themes. She's known for such works as The Sorrow Dance and The Freeing of the Dust.