This article puts forward the claim that private law, and especially contract and tort, is the area of law that most clearly shows how law depends on social interactions. Taking its cue from Lon Fuller, interactional law is presented as a form of law that depends on informal social practices. Using tort and contract cases, it is argued that this implies that law is in open connection to moral norms and values, and that law cannot be understood without taking into account people’s everyday reciprocal expectancies.

Communities can only be dynamic and projective, that is, oriented towards new and better forms of cooperation, if they bring together diverse people in a common, and hopefully more equal, socio-political life and in welfare. The latter requires not only back-stretched connections, that is, the involvement of co-nationals and naturalized persons, but also forward-starched connections, that is, the involvement of citizens in waiting. Societal integration is an unhelpful notion and liberal democratic polities would benefit from reflecting critically on civic integration policies and extending the norm of reciprocity beyond its assigned liberal national limits. Reciprocity can only be a comprehensive norm in democratic societies - and not an eclectic one, that is, either co-national or co-ethnic.