Many group theorists all over the world have been trying in the last twenty-five years to extend and adapt the magnificent methods of the Theory of Finite Soluble Groups to the more ambitious universe of all finite groups. This is a natural progression after the classification of finite simple groups but the achievements in this area are scattered in various papers.

Our objectives in this book were to gather, order and examine all this material, including the latest advances made, give a new approach to some classic topics, shed light on some fundamental facts that still remain unpublished and present some new subjects of research in the theory of classes of finite, not necessarily solvable, groups.

Covers the latest achievements of the Theory of Classes of Finite Groups Introduces some unpublished and fundamental advances in this Theory Provides of a new insight of some classic facts in this area Gathers the research of many authors scattered in hundreds of papers Contributes to the understanding of the structure of finite groups by adapting and extending the successful techniques of the Theory of Finite Soluble Groups

Inhalt
Maximal subgroups and chief factors.- Classes of groups and their properties.- X-local formations.- Normalisers and prefrattini subgroups.- Subgroups of soluble type.- F-subnormality.- Fitting classes and injectors.