Introduction: TheProblems(1) Whichever is taken as the point of departure, a general principle of liability for injurious acts done intentionally or negligently, or a catalogue of individual protected interests, and whatever the wish to establish criteria of general liability, a comparison between some of the leading systems of the law of the Western World—both civil and common law—shows that it is impossible to get away from the individual situation, irrespective of the force of an existing, or the desire for the creation of, a general principle.