Fundamental Legal Concepts: A Formal and Teleological Characterisation

We shall introduce a set of fundamental legal concepts, providing a definition of each of them. This set will include, besides the usual deontic modalities (obligation, prohibition and permission), the following notions: obligative rights (rights related to others’ obligations), permissive rights, erga-omnes rights, normative conditionals, liability rights, different kinds of legal powers, potestative rights (rights to produce legal results), resultive declarations (acts intended to produce legal determinations), and sources of the law.