Long Day's Journey into Night is a drama in four acts written by American playwright Eugene O'Neill in 1941–42 but only published in 1956. The play is widely considered to be his masterwork and magnum opus. O'Neill posthumously received the 1957 Pulitzer Prize for Drama for the work. Long Day's Journey into Night is often numbered on the short list of being among the finest American plays in the 20th century alongside A Streetcar Named Desire and Death of a Salesman.
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