When this book seeks to encompass the theoretical foundations of recent private law theory (private law understood in a broad sense, encompassing questions of regulation and rule-setting in particular), it takes a stance on legal theory that draws heavily on broad social theory (i.e. on theory developed for the most part outside legal scholarship). It seeks to combine it with legal theory in the narrow (traditional) sense, looking at law (in its changing structure) namely with tools of legal philosophy such as logic or ethics and from within legal scholarship. In this, ‘The Inside and the Outside of Law?’ as a title refers to a topic for discussion rather than making a statement. Private law theory as proposed by legal scholars will be combined with concepts drawn from law and economics, legal philosophy, sociology and the behavioural sciences; constitutionalism combined with considerations of consensus and its intrinsic justification – all in relation to markets, risks, persons and organizations.