Fragmentation is currently discussed mainly in the context of international law; this book shows that the complexity of regulations and multiplicity of institutions in a non-hierarchical order lead to fragmentation in national legal systems as well as in international law. However, the aim of the book is not merely to describe contemporary fragmented law, but rather to offer arguments for strengthening the systemic character of law. The book explores methods of pro-systemic interpretation, the principle of proportionality, legal pluralism, and these analyses result in the conception of normative coherentism. While the vast majority of scholarship associates coherentism with epistemological issues, such as the coherence theory of truth, this work emphasises the importance of an approach to law that focuses on the underlying principles and doctrines that form its foundations, as well as the connections between the various elements of the legal system that need to be discovered through the doctrinal study of law. The axiological, not axiomatic, nature of law, complexity theory and common foundations of simultaneously applicable legal systems are described as the basic premises of normative coherentism. The author outlines manifestations of normative coherentism in various processes in law, especially in law- and decision-making.