This collection of essays presents a systematic and up-to-date survey of the main aspects of Georg Henrik von Wright's philosophy, tracing the general humanistic leitmotiv to be found in his vast, varied output. The analysis covers the developments in Von Wright's thought up to the end of the 1990s. The essays are arranged thematically to focus on the chief areas of Von Wright's interests: practical rationality; human action and determinism; philosophical logic and theories of norms; research in the analytical tradition; and Wittgenstein studies. Readership: Scholars and students of moral philosophy, logic, psychology, sociology, cognitive science and the history of contemporary philosophy.Introduction; R. Egidi. I: Von Wright Interpreter of Wittgenstein and Analytic Tradition. Wittgenstein and Tradition; G.H. Von Wright. Wittgenstein and Our Times; C. Penco. What is Analytical Philosophy? C. Cozzo. `In the Beginning Was the Deed': The Private Language Argument; D. Pears. Naturalism, The World and Truth; M. Dell'Utri. What Wittgenstein Wrote; J. Schulte. Von Wright on `On Certainty'; A. Stroll. Morphology in Wittgenstein; M. Andronico. II: Modes of Practical Rationality: Actions, Intentions, and Will. Rationality and Norms: Kelsen and von Wright; G. Marramao. Actions, Causes, and Supervenience; S. Gozzano. The Logical Connection Argument Again; S. Nannini. Justice, Cooperation, and the `Golden Rule': Notes on `The Varieties of Goodness'; G. Frongia. Von Wright on Mind-Body Problem; M. De Caro. The Conflict between a Static and a Dynamic Theory of Time in Its Relation to von Wright's Work and to Human Freedom; M. Dorato. W. James' Defence of Free Will: a Step Toward a Paradigm Shift; R.M. Calcaterra. Is Determinism Impossible? P. Dess?. III: Philosophical Logic and Normative Discourse. The Significance of Philosophical Logic; D. Prawitz. A Remark about the Principle `Ought Entails Calăd