Henrik Ibsen, the father of modern drama, revolutionized theatre in the late 19th century. His plays challenged well-made play conventions, introducing realism and exploring controversial themes like women's rights and societal hypocrisy. Ibsen's work marked a shift from romanticism to realism in theatre. Ibsen's major works, including "A Doll's House" and "Hedda Gabler," critiqued bourgeois society and explored individual freedom versus societal expectations. His innovations in dramatic technique, such as realistic dialogue and the "retrospective technique," influenced modern playwrights and continue to shape contemporary theatre.