Abstract

This article utilises Luhmann's functional analysis to investigate the role played by legal argumentation within the legal system. Luhmann's sociological observations on this subject suggest an alternative to jurisprudential approaches that understand legal arguments and consequent decisions in terms of the relative strengths of the justifications offered in their support. His account examines the role played by legal argumentation in allowing the legal system to evolve in response to society's increasing complexity. The concepts he employs to analyse this evolutionary capacity of law, developed from their origins in information theory, are redundancy and variety. Beginning with the work of Dworkin the article opens up Luhmann's analysis to consider how legal argumentation operates both as a grounded form of communication, capable of identifying weak or unsustainable interpretations of legal texts, and a mechanism for evolving law in the direction of increasing complexity.