This study appears at a time when a decisive turn is due in the research on personality development. After many years of stagna tion and misguided research in this field, this book should lead to a thorough revision and a better understanding of current views on the factors which have an influence on personality. Let us consider the unsatisfactory aspects of the recent develop ments in personality studies. At the beginning of this century, the revolutionary insight gained ground that personality is susceptible to various influences, in particular to those resulting from human interaction....