Calder Willingham
Calder Baynard Willingham, Jr. (December 23, 1922 - February 19, 1995) was an American novelist and screenwriter. He cowrote several notable screenplays, including Paths of Glory (1957) and One-Eyed Jacks (1961). Willingham and Buck Henry were co-credited (but did not collaborate) on the screenplay for The Graduate (1967), which they adapted separately from a novel by Charles Webb; they won a BAFTA Award for Best Screenplay for their work and were also nominated for an Oscar. Description above from the Wikipedia article Caroline D'Amore, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Crew

Paths of Glory
Screenplay

The Strange One
Novel, Theatre Play, Screenplay

Little Big Man
Screenplay

Rambling Rose
Screenplay, Author

The Vikings
Screenplay

The Graduate
Screenplay

One-Eyed Jacks
Screenplay

Dağların Oğlu
Screenplay

Thieves Like Us
Screenplay

Spartacus
Scenario Writer

Thou Shalt Not Commit Adultery
Writer