Abstract: Papers of Robert Lasch, a journalist who was editorial writer for the Chicago Sun-Times (1942-1950) and the St. Louis Post-Dispatch (1950-1957) and editor of the editorial page of the latter paper (1957-1971). Well known for his columns on civil liberties and McCarthyism, Lasch also wrote in opposition to the Vietnam War and in 1966 was awarded the Pulitzer Prize for his editorials on that subject. Correspondence, 1942-1971, is both general and from readers. Among the prominent letter writers are Herbert L. Block, Marquis W. Childs, Henry Steele Commager, J. William Fulbright, Hubert H. Humphrey, Arthur M. Schlesinger Jr., Adlai E. Stevenson, and W. Stuart Symington. Office memoranda include exchanges with Joseph Pulitzer Sr., Marshall Field III, and members of their respective staffs. Documenting his writings are editorial reprints; free-lance articles, particularly for The Progressive,The Reporter, and The Nation; and several unpublished manuscripts. Indicative of his research methodology are subject files and notes on civil rights, national defense, McCarthyism, pacifism during the Vietnam War, federal aid to education, the presidential campaigns of 1952 and 1956, the National Conference of Editorial Writers, and his Pulitzer Prize award.