With so many afflicted by the slings and arrows of outrageous angst, its true origin has remained mysterious. A new theoretical synthesis suggests that while animals share a set of evolved social instincts, we humans experience commonplace Anxiety and Depressive disorders when we use our reason to defy that biology. This is an interesting book by an author with a wealth of clinical and research experience. He has done a very thorough job on the research behind his theories and express them clearly and succinctly... I would recommend the book.