[1] He was in a group show at the Light Sound Dimension Gallery in one of the several Rolling Renaissance exhibitions in San Francisco in 1968.
[1] In the late 1960s Kagan shot a series of erotic photographs that were used by designers in rock concert posters.
[1][3][4] He worked with Family Dog,[5] a production company in San Francisco run by Chet Helms, which organized concerts.
[6] Kagan's photographs were the subject of a retrospective exhibition in 2014 at the World Erotic Art Museum in Miami.
[1][8][9] Following five years of research,[8] in 1975 Kagan published a book titled New World Utopias: A Photographic History of the Search for Community.