“We Shall Overcome,” a song that was the “unofficial anthem to the civil rights movement,” was wrongly placed under copyright and should be put in the public domain, according to a lawsuit filed today in federal court. The complaint (PDF) was filed by the same group of lawyers who succeeded at putting the world’s most famous song, Happy Birthday, into the public domain after years of litigation. It’s a proposed class action that seeks the return of copyright licensing fees they say were wrongfully collected by Ludlow Music Inc. and The Richmond Organization, which claim to have copyrighted “We Shall Overcome” in 1960. —Ars Technica