Paul McCartney and Yoko Ono have finally buried the hatchet after decades of feuding.

The 71-year-old opens up about their peace treaty and what was behind his decision to end their bitter battle in an interview with the new issue of Rolling Stone —and Popdust has the details.

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"She's badass," McCartney says. "Time, the great healer. I thought, 'If John loved her, there's got to be something. He's not stupid.''

"[George Harrison] would say to me, 'You don't want stuff like that hanging around in your life."

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McCartney and Ono—who was married to John Lennon from 1969 until the time of murder in 1980—have been feuding for years, mostly over songwriting credits for Beatles tunes.

But McCartney is going out of his way to build bridges nowadays—even giving the 80-year-old widow credit for helping John further develop his creative side and props for helping him write the Lennon classic, Imagine.

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"I don't think he could have done that without Yoko, so I don't think you can blame her for anything," McCartney says. "When Yoko came along, part of her attraction was her avant garde side, her view of things, so she showed him another way to be, which was very attractive to him."

Pick up the November 7 issue of Rolling Stone to read the full interview.