Over 47 years, Claire and WMS Russell studied virtually all aspects of behaviour, including animal, human, individual and social, as well as the whole history of human civilisation.In an age of academic specialization, their breadth of knowledge in many fields is most unusual and enabled them to develop theories of exceptional depth and range.

They have been long recognized internationally as leaders in many fields.
Their work has answered questions of major importance about family life, individual behaviour and the course of world history. In particular, it has thrown completely new light on the causes and nature of violence.