Several dozen great musicians came together to sing Lennon's Give Peace a Chance to protest the upcoming Gulf War. Surely the impact would be as great as the original song or more.
No. Incredibly well intentioned, incredibly poorly done. The singers are so different in style, tone, range, manner, that it comes off wildly disjointed and confusing. It's also obvious none of the singers ever met. There's no "chorus" at all, not attempt to blend together like the more famous and better done We Are the World type songs.
The song was only rarely played on the radio, the video only briefly on Empty Vee. You watched it one time out of curiosity, then felt dismayed this was the best antiwar musicians could do. Listen to Ice T's Ya Shoulda Killed Me Last Year instead.