Todd Gitlin (born 1943) is an American sociologist, political writer, novelist, and cultural commentator. He has written widely on the mass media, politics, intellectual life and the arts, for both popular and scholarly publications.

In his youth, Gitlin was a political activist, beginning in 1960, when he joined a Harvard group called Tocsin, against nuclear weapons. In 1963 and 1964, Gitlin was president of Students for a Democratic Society; he was elected, he writes, because "none of the other four candidates, each of whom was experienced, was willing to serve," since "we mistrusted power, including our own! Recruiting leaders was hard." (Letters to a Young Activist, p. 117) He helped organize the first^{[citation needed]} national demonstration against the Vietnam War, held in Washington, D. C., on April 17, 1965, with 25,000 participants, as well as the first civil disobedience directed against American corporate support for the apartheid regime in South Africa - a sit-in at the Manhattan headquarters of Chase Manhattan Bank on March 19, 1965. In 1968, he signed the “Writers and Editors War Tax Protest” pledge, vowing to refuse tax payments in protest against the Vietnam War.

David Greenberg (born March 8, 1971 in New Haven, Connecticut) is a poet, songwriter and art critic.

Greenberg attended Rutgers University from 1989 to 1993. In December 1989, Greenberg met poet Allen Ginsberg in New York City. Greenberg published two chapbook collections of verse in 1991: Flesh and Astronomy. By 1994, Soft Skull Press published Feeling Gravity's Pull, the first "official" collection of poems by David Greenberg. That same year, Greenberg founded the NYC indie rock band Pen Pal along with poet and drummer Mario Mezzacappa. Pen Pal released one album Best Boy on Paradigm Records in 1996.

In addition to his poetic and musical projects, David Greenberg has collaborated on numerous catalogues with artist Donald Baechler including 1998's Crowd Paintings (published by Lars Bohman Gallery in Stockholm, Sweden) and 2002's 15 Paintings/15 Texts (published by Bernd Kluser Gallery, Munich, Germany). Greenberg's essays on artists Patti Smith and Donald Baechler have appeared in PARKETT magazine; and his writings on photographer Ryan McGinley, poet Gregory Corso and actor Leo Fitzpatrick appeared in the FADER magazine.