The Book Analyses And Explains The Legal Significance Of The Distinction Between Acts And Pure Omissions In Tort Law. It Articulates An Alternative Distinction Between Worsening And Not-worsening Which It Proposes As A Desirable Re-conceptualisation Of The Current Law. It Defends The Justifiability Of A Distinction In Tort Between Positive And Negative Duties On Grounds Of Non-instrumentalization And Freedom. It Then Provides An Conceptual And Normative Analysis Of Possible Examples Of Positive Duties Which Arise In Tort Law, Such As Innocent Creation Of Risk, Interference With Aid, Assumption Of Responsibility, Control, Special Statutory Duties, And The Duties Of Public Authorities-- Provided By Publisher.