Explore the profound emotional landscape of Eugene O’Neill’s groundbreaking theatre. This critical study delves into his unique philosophy of “difficult theatre,” revealing how he masterfully evoked primal responses of pity and fear to guide audiences toward catharsis and forgiveness. By re-examining his complete works, from lesser-known pieces to his Pulitzer Prize-winning masterpieces, Jeremy Killian uncovers a revolutionary approach to tragedy that prioritizes deep emotional engagement over rational detachment. An essential read for students of American drama, theatre scholars, and anyone fascinated by the enduring power of O’Neill’s contributions to modern theatrical art.