Cover -- Half Title Page -- Title Page -- Copyright Page -- Original Title Page -- Original Copyright Page -- Contents -- Preface -- 1 Introduction -- 2 Probability And Possibility For Choice -- 1 Introductory -- 2 A Theory About Personal Power -- 3 A Criticism Of Keynes -- 4 Some More Theories About Personal Power -- 5 An Analogy Between Two Kinds Of Possibility -- 3 Probability And Natural Powers -- 1 Introductory -- 2 The Relation Between Epistemic And Natural Possibility -- 3 A Criticism Of The Doctrine That 'Probable' Is Ambiguous -- 4 A Comparison Of Possibility With Probability -- 4 Some Unobservable Properties -- 1 Introductory -- 2 Certainty, Necessity And Hume -- 3 Epistemology And Determinism -- 4 An Analysis Proposed And Defended -- 5 Power And Law -- 5 Some Puzzles About Potentiality -- 1 Introductory -- 2 The idea of a 'circumstance' -- 3 The Distinction Between Intrinsic And Extrinsic Properties -- 4 The Refutation Of Actualism -- 5 The Refutation Of The Theory That 'All Power Is Conditional' -- 6 The Powers Of People Andthe Powers Of Things -- 1 Introductory -- 2 The Distinction Between Natural And Personal Power -- 3 The Refutation Of Ryle's Dispositionalist Account Of Human Capacities -- 7 IFS And Cans -- 1 Introductory -- 2 The Refutation Of The Theory That All Personal Power is Conditional -- 3 A Refutation Of The Orthodox Account Of 'I Can', As Equivalent To A Conditional Statement -- 4 A Contradiction In Dispositionalism -- 5 Further Objections To The Orthodox View -- 6 The Verification Of 'I Can': More About Trying -- 8 Deliberation, Freedom And Meaning -- 1 Introductory -- 2 More About Possibility And The Context Of Deliberation -- And About The Relation Between Power And Will -- 3 On Not Being Able To Help It: A: Discussion Of The Relationship Between Power And Responsibility -- 4 On The Meaning Of Words Like 'Can'