Alexander Comfort, MB BChir, PhD, DSc (10 February 1920 – 26 March 2000) was a British medical professional, gerontologist, anarchist, pacifist, conscientious objector and writer, best known for The Joy of Sex, which played a part in what is often called the sexual revolution. He was also the author of many other books on a variety of topics.

Comfort was educated at Highgate School and Trinity College, Cambridge. He studied medicine at the University of Cambridge (pre-clinical study leading to a BA, upgraded in 1944 to an MA) and the London Hospital (now known as the Royal London Hospital), qualifying in 1944 with both the Conjoint diplomas of LRCP London, MRCS England and the Cambridge MB BChir degrees.

As a youth, Comfort lost four fingers on his left hand in an explosives accident.

Comfort served as a House Physician at the London Hospital and went on to become a lecturer in physiology at the London Hospital Medical College. In 1945 he obtained the Conjoint Board's Diploma in Child Health, and progressed to a PhD in 1950 and a DSc of University College, London in 1963.

Peter "Pete" Seeger (born May 3, 1919) is an American folk singer and an iconic figure in the mid-20th-century American folk music revival. A fixture on nationwide radio in the 1940s, he also had a string of hit records during the early 1950s as a member of The Weavers, most notably their recording of Lead Belly's "Goodnight, Irene", which topped the charts for 13 weeks in 1950. Members of The Weavers were blacklisted during the McCarthy Era. In the 1960s, he re-emerged on the public scene as a prominent singer of protest music in support of international disarmament, civil rights, and environmental causes.

As a song writer, he is best known as the author or co-author of "Where Have All the Flowers Gone?", "If I Had a Hammer (The Hammer Song)", (composed with Lee Hays of The Weavers), and "Turn, Turn, Turn!", which have been recorded by many artists both in and outside the folk revival movement and are still sung throughout the world. "Flowers" was a hit recording for The Kingston Trio (1962); Marlene Dietrich, who recorded it in English, German and French (1962); and Johnny Rivers (1965). "If I Had a Hammer" was a hit for Peter, Paul & Mary (1962) and Trini Lopez (1963), while The Byrds popularized "Turn, Turn, Turn!" in the mid-1960s, as did Judy Collins in 1964, and The Seekers in 1966. Seeger was one of the folksingers most responsible for popularizing the spiritual "We Shall Overcome" (also recorded by Joan Baez and many other singer-activists) that became the acknowledged anthem of the 1960s American Civil Rights Movement, soon after folk singer and activist Guy Carawan introduced it at the founding meeting of the Student Nonviolent Coordinating Committee (SNCC) in 1960. In the PBS "American Masters" episode Pete Seeger: The Power of Song, Seeger states it was he who changed the lyric from the traditional "We will overcome" to the more singable "We shall overcome".