I doubt that there was really a rift between Bobby Darin and Tim Hardin. In fact, they sort of traded songs, with Hardin doing "Simple Song of Freedom" and Darin doing "If I Were a Carpenter" Darin worked with Jim (aka Rodger) McGuin in 1963, and much of his later work would have to be called Folk-rock. He also grew a large beard at one time and hung with a politically active group. Drugs, anti-war and civil rights. In short, he was part of the 60s.