Sophie Anita Treadwell (October 3, 1885 – February 20, 1970) was an American playwright and journalist of the first half of the 20th century. She is best known for her play Machinal which is often included in drama anthologies as an example of an expressionist or modernist play. Treadwell wrote dozens of plays, several novels, as well as serial stories and countless articles that appeared in newspapers. In addition to writing plays for the theatre, Treadwell also produced, directed and acted in some of her productions. The styles and subjects of Treadwell's writings are vast, but many present women's issues of her time, subjects of current media coverage, or aspects of Treadwell's Mexican heritage.|thumb]]
Treadwell received her Bachelor of Letters in French from the University of California at Berkeley, where she studied from 1902 to 1906. Gringo was Treadwell's first play to be produced on Broadway.||
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| The Settlement || 1911 || unpublished
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| Guess Again || 1915–1918 || 2-character one-act premiered on Broadway September 1928-November 1928 and was revived on Broadway January 2014-March 2014.
- Zoe Akins
- Djuna Barnes
- Rachel Crothers
- Zona Gale
- Alice Gerstenberg
- Susan Glaspell
- Georgia Douglas Johnson
- Edna St. Vincent Millay
- Gertrude Stein
Through the use of various 'isms' these playwrights explored new and alternative ways of presenting women's lives in their plays.