In a perfect world, Crosby, Stills, Nash, & Young would be gearing up for its 50th anniversary world tour next year -- trouble is; Neil Young and Graham Nash aren't talking to David Crosby. Not that "Croz" is sitting around waiting for the call -- he'll be hitting the road for a 21-date solo tour next month and is currently prepping his fifth solo album in as many years.

Crosby spoke frankly about his relationships -- or lack thereof -- with his CSNY bandmates, telling Mojo magazine, "I have apologized to Neil (Young) for slagging (now-wife Daryl Hannah). I don't think that's what's really going on. Neil has only really ever worked with us when he thought he needed us. We're part of his plan. Neil has a plan. And when he needs us, he'll call us up. Now, he doesn't need us. He's filling big places by himself. That's a good band. I've seen a tape of him playing with that band where he's playing as good as I've ever seen him play, ever. Doing 'Cortez The Killer' and f***ing nailing it. Put all those things together, man, in your head and ask yourself is he gonna call us up and get into a bundle of. . . I mean, it's a f***ing therapy session trying to get us to talk to each other. Why would he bother?"

Regarding Nash, Young, and Stephen Stills' feelings about him, Crosby said, "If they're mad at me, they're mad at me -- I'm sorry. But I still can't sit around praying for them to change their mind. I have to make music now, while I can. I don't have any bad feelings about any of those guys in my heart. I would work with any of them at any point. Roger McGuinn, Neil Young, Stephen Stills, Graham Nash. I would work with any of them."

Today, Crosby is amazed at how strong his current work is -- as well as the level of musicianship he keeps: "Look man, I did everything wrong. I did it all wrong, so there's no excuse for me to me singing the way I am right now. My partners? My current partners that are so good I have to paddle faster to keep up? Those ones? They all tell me that I'm singing as good as I've ever sang in my life. And I don't think they're buttering my toast, they're not that kind of people."

David Crosby explained how 50 years on, Crosby, Stills, & Nash ended up where it is today -- and how things got so bad: "I quit. You start out being very much in love with each other and you love each other's music, and you're havin' a blast -- and you wind up 40 years later, not likin' each other and it's down to just turn on the smoke machine and play your hits and it's no fun. And it was stifling music for me. It was making music be no fun. It's sort of like jumping off a cliff and then, halfway down, I put out (my solo album) Lighthouse, and that was like growing a set of wings."

AUDIO: DAVID CROSBY ON QUITTING CSN