Encyclopedia Britannica - History of Modern Theatre
https://www.britannica.com/art/theater-building/The-evolution-of-modern-theatrical-production
This section of the Encyclopedia Britannica entry on theatre provides a great deal of relevant information about theatrical Naturalism and other forms of modern theatre.
The Strindberg Society - August Strindberg Biography
https://auguststrindberg.se/biography/
This website provides comprehensive overviews of Strindberg's life and works.
The Guardian - Strindberg spiked with the politics of empire
This review of a...