Introduction: On Revenge Tragedy and the Shaping Influence of Classical Philosophy; 1. Oeconomia and the Vegetative Soul: Thomas Kyd’s Naturalisation of Revenge in The Spanish Tragedy; 2. Fixing Moderation: Titus Andronicus and the Aristotelian Determination of Value; 3. ‘A fine pate full of fine dirt:’ Hamlet Among the Atomists; 4. ‘Vein by vein:’ The Pneumatics of Retribution in John Marston’s Antonio’s Revenge; 5. Prohairesis on the Inside: The Duchess of Malfi and Epictetian Volition; Epilogue: A kind of sensible justice; Index.