This printing of william james masterwork the principles of psychology contains his original . The principles of psychology volume one in this edition the first volume of william james masterwork the principles of psychology contains his original notes illustrations tables and charts which clarify the theory described and arguments madeappearing in 1890 the principles of psychology was a landmark text . The principles of psychology is a two volume introduction to the study of the human mind based on . The principles of psychology took him 12 years to write he considered psychology a natural science that required analysis of feelings desires cognitions reasoning and decisions according to their own features and dynamics in the same way that one would explain building a house by looking at its component parts. Among his most influential books are the principles of psychology which was a groundbreaking text in the field of psychology essays in radical empiricism an important text in philosophy and the varieties of religious experience which investigated different forms of religious experience which also included the then theories on mind cure