This book explores a broad range of concepts of, and approaches to, far-right parties and ultranationalist ideology, and studies the legal and political discourses within which they are often embedded. Offering detailed insights into the nature of the far-right and its viewpoints, the book provides a multidimensional study of the evolution of the far-right and its impact on the contemporary European political and party system, society and state. In addition, a clear definition of the substantial amount of criminal far-right parties in the Annex of the book dispels the illusion that far-right ultranationalist groups do not represent a danger for both society and state. This book has several unique aspects, particularly its use of catalogues that allow for the researching of far-right parties and ideology according to concrete definitions.