This was particularly galling to Mr. Kirkman, a staunch liberal who included an antiwar song, “Requiem for the Masses,” as the B-side of the “Never My Love” single.

“I am a natural-born civil rights activist from Kansas, and I was on the road with three guys who were really conservative, reactionary people,” he told Mr. White. “I stood back thinking, ‘That’s cool. That’s completely fair.’ You know, walk and talk, live your life. But it’s not the art that I want to make. I want the art to be about something besides jumping in the back seat, kiss me, doo-wop, doo-wop.”

Terry Robert Kirkman was born on Dec. 12, 1939, in Salina, Kan., the youngest of two sons of Millard and Lois (Murphy) Kirkman. When he was a child his family moved to Chino, Calif., near Los Angeles, where his father managed an auto-parts store and his mother taught music.

After receiving an associate degree in music at nearby Chaffey College, he became enmeshed in the flourishing scene at the Troubadour, the famed West Hollywood nightclub that served as a launching pad to stardom.

Before long, Mr. Kirkman and Mr. Alexander — whom he had met at a party in Hawaii in 1962, when Mr. Alexander was in the Navy — formed a loose-knit folk ensemble called the Inner Tubes, featuring some 20 members, to perform at open-mic hootenanny nights at the club, with guest appearances by the likes of David Crosby and Cass Elliot of the Mamas and the Papas. The Inner Tubes eventually evolved into a 13-member band called the Men, which after a year winnowed down to the Association.

In addition to his wife of 30 years, Mr. Kirkman is survived by his daughter, Alexandra Sasha Kirkman, from his first marriage, which ended in divorce, and two grandchildren.