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John greatly did, with all his anti-war efforts after the breakup ( I recommend watching The U.S. vs. John Lennon for more on that). George did as well, to a lesser extent, with his Concert for Bangladesh. Ringo, as a solo artist, sung a song or two about peace, and Paul's recently (as in the last 20 years) gone into vegetarianism and animal rights. As a whole, The Beatles themselves did little, besides songs such as "All You Need is Love" and "Revolution", which were both written by John.

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13y ago

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