Celebrated for their conceptual clarity, titles in the Clarendon Law Series offer concise, accessible overviews of major fields of law and legal thought. This chapter deals with economic torts. Economic torts include deceit, malicious falsehood, passing-off, inducing breach of contract, intimidation, and conspiracy. The first three involve deception: deceit is telling lies to the claimant; telling lies to a third party is malicious falsehood; misleading a competitor's customers, even bona fide, is passing-off. The other three torts all involve collaboration, whether reluctant, as a result of threats, complaisant as a result of positive incentives, or spontaneous. The chapter discusses the nature of the harm; the defendant's conduct and purpose, anti-competitive conduct; and the various ‘economic torts’ in terms of their various components: intention, conduct, and wrongfulness.