Book's

Carl Rogers was a stubborn warrior when he entered many battles - battles in the field of treatment of income with scientific medicine and psychiatry, who tried to prevent psychologists from treating patients..

The late Carl Rogers, founder of the humanistic psychology movement, revolutionized psychotherapy with his concept of client-centered therapy. His influence has spanned decades, but that influence has become so much a part of mainstream psychology that the ingenious nature of his work has almost been forgotten. Houghton Mifflin is delighted to introduce this preeminent psychologist to the next generation with a new edition of this landmark book.

There is a common theme linking these studies this topic comes from the depth and diversity and richness of human nature from the side, and the other side also stems from humans and worthlessness in this nature.
In this book by Rollo May discusses some of the characteristics of human nature and human under the title of "problematic".