As much as any record, CSN's 1969 debut ushered in the early 1970s singer-songwriter boom. Yes, this was a group, but it was one made up of three equal composer/vocalists, each with a heady resume--Crosby an ex-Byrd, Stills in Buffalo Springfield, and Nash a former member of the Hollies. Each supplied distinctive material and contributed to CSN's trademark harmonies.