After leaving "Sing Out!", Silber became cultural editor of the left-wing newsweekly the Guardian (US) in 1968; he became its executive editor in 1972 and led it into the milieu of the New Communist Movement.
After leaving "Sing Out!" in 1968, Silber became cultural editor of the independent radical newsweekly, the National Guardian (US) and also its film critic. He became the Guardian's executive editor in 1972 and led it into the milieu of the New Communist Movement.