Professor Seliger's theory is based on an approach and conceptualizations which will appeal both to ’traditionalists’ and 'behaviourists'since he gives due weight to both kinds of literature. Indeed, this book reflects throughout a detachment and independence of thought which are refreshing and opens up the way for both theorists and practising politicians to re-examine ideological tenets in the light of actual and feasible policy orientations and embark upon ideological reconstruction.