August Forel – The Sexual Question
This book is the fruit of long experience and reflection. It has two fundamental ideas–the study of nature, and the study of the psychology of man in health and in disease. To harmonize the aspirations of human nature and the data of the sociology of the different human races and the different epochs of history, with the results of natural science and the laws of mental and sexual evolution which these have revealed to us, is a task which has become more and more necessary at the present day. It is our duty to our descendants to contribute as far as is in our power to its accomplishment. In recognition of the immense progress of education which we owe to the sweat, the blood, and often to the martyrdom of our predecessors, it behoves us to prepare for our children a life more happy than ours.