The ultimate reasons for recommending this book are admirably stated by Louis J. A. Merier of Harvard University.... ""It may well now be asked whether it would not be appropriate for American schools of education to widen their offerings by presenting to their students the data for realistic as well as for monistic interpretations of human activity?.....And no it would seem worth while, now that we have fully explored anew the possibilities of the least promising of our two fundamental alternatives, monism, in the conception of reality, to re-examine more closely whether the other, hallowed as it is by centuries of the spontaneous belief of the race as well as by the reasoned allegiance of so many powerful thinkers throughout the ages, may not be proved to be the more founded in fact as well as the more pragmatically valuable?"" The re-examination referred to is carried out with a sweep and copiousness of illustrative material and quotation not often parallelled. The Author -- Father Jaime Castiello's own education as well as his antecedents are the best guarantee of a production that envisages every factor and takes note of every aspect of the problem of humanistic formation. Educated in Mexico and England, Spain and Germany, observing over a prolonged period educational practice besides taking deep and penetrating cognizance of the theory from the point of view of the conflicting systems, he is eminently qualified to pronounce authoritatively.