At the turn of the twentieth century the Russian actor, director, and teacher Konstantin Stanislavski set out to solve a practical problem: how can an actor produce truthful, believable behavior on stage, night after night, on demand? His answer became the most influential acting method in modern Western theatre and the foundation of psychological realism. Almost every later approach either builds on his ideas or defines itself against them.
Nineteenth-century acting often relied on stock gestures and declamatory delivery. Stanislavski, co-founder of the Moscow Art Theatre, wanted performances rooted in genuine inner life rather than external cliché. He studied his own best work and asked what conditions made it feel alive. Out of decades of experiment he dev