Newspapers are a great source for historical context. They also include articles reviews, interviews and general news about the theatre. Note the dates of coverage. NYTimes.com is a especially helpful for finding out the initial critical reactions to plays that premiered before 1980.
Full text of the Baltimore Sun, Christian Science Monitor, New York Times, Wall Street Journal, and Washington Post, from the 1980s to the present on the Proquest database platform.
Access to full content at NYTimes.com and all of its features from 1851 to the current issue. All staff, faculty, and currently-enrolled students at SU can register for full access to NYTimes.com. Print copies of current issues are also available in the library.
Includes a 40-year archive of curated news, legal, and business sources, including U.S. Supreme Court decisions dating back to 1790.
The MLA is a good source for finding information about themes in plays.
A subject index by the Modern Language Association (MLA) including books and articles published around the world on modern languages, literature, folklore, and linguistics.