Classic rock supergroup Crosby, Stills & Nash, a.k.a. Crosby, Stills, Nash & Young, are fully and completely broken up forevermore, as Graham Nash tells Billboard in a new interview. The reason: Nash says he and David Crosby have had a total falling out, and "I don't want anything to do with Crosby at all." He declares that not only will the group never record an album again, but they'll never do a show again either. This means that the group's couple of shows in early 2014 will go down as their last in the US, and the last performance that Crosby, Stills, Nash & Young gave together was at the October 2013 Bridge School Benefit in Mountain View, which SFist attended.

Nash goes on to explain he's been receiving some "nasty" emails from Crosby, though he doesn't elaborate on the subject of them. Nash earlier said to Dutch magazine Lust for Life,

"I don't like David Crosby right now. He's been awful for me the last two years, just fucking awful. I've been there and saved his fucking ass for 45 years, and he treated me like shit. You can't do that to me. You can do it for a day or so, until I think you're going to come around. When it goes on longer, and I keep getting nasty emails from him, I'm done. Fuck you. David has ripped the heart out of Crosby, Stills, Nash & Young... The truth is, after being totally immersed in me and David and Stephen and Neil's music, I'm done. I've had 10 years of it. Leave me the fuck alone. I need to concentrate on me now."

Consequence of Sound notes that Neil Young expressed some similar feelings about Crosby's hostility two years ago, also saying he couldn't work with him anymore. Crosby had made some public comments about Young's current girlfriend Daryl Hannah, with whom he's now living in Southern California, calling her a "purely poisonous predator," a comment for which he's since apologized.

The comments come just as Nash, 74, is releasing his first solo album in 14 years, titled This Path Tonight, which comes out April 15.

Crosby, Stills & Nash toured together as recently as September and October of 2015, when they did a series of shows in England and Europe.

While the four, including Young, have gone their separate ways before to do solo albums and tours, something all four are doing currently, fans have been used to expecting occasional reunions like those that have happened in the last two years.

Now, however, Nash insists, "In my world there will never, ever be a Crosby, Stills, Nash & Young record and there will never be another Crosby, Stills & Nash record or show."

Below, footage from one of those last shows, in 2014.