According to a Graham Nash and Stephen Stills interview with Mojo
magazine in 2021, this was the last song written for Deja Vu
, their first album with Neil Young in the group. They were walking to the studio from their hotel when Nash said, "We don't have a suite," meaning a hotel suite. Stills thought he was talking about a musical suite like "Suite: Judy Blue Eyes
" and replied, "I know, we used it for our first record" (Crosby, Stills & Nash
"I would be shocked if after 'Suite: Judy Blue Eyes,' anyone got up and changed the record," Nash said. "Once you hear that you want to hear the rest."
Stills agreed and immediately had an idea. He recalled to Mojo
: "I went back to my room in this horrifying hotel and the next morning I knocked on Graham's door and said, 'OK, how's this?' And I played him 'Carry On' and he went nuts. So we got everybody together in the studio and recorded it."