In recent times the problem of human survival has received literary treatment from famous personalities of every profession. What separates Mr. Nef's new work from the crowd is its not to nuclear stalemate and civil defense as alternatives to ultimate but rather to the complicated problems of our personalities that are in need of solution if the atomic age is not to become a nightmare. The author's thesis is that the future of mankind is bound up with the creation of a harmonious world society, the essential basis of which is a common understandings of the purposes of existence, But men cannot realize their unity with others unless they practise the virtues of love and charity. Herein lies the problem, for Mr. Nef finds the existing resources for the propagation of faith inadequate, and notes also the absence in our society of any principles which transcend the world's most diverse laws and rules. Mr. Nef's sincerity is transparent, and his opinions are to be respected. He has something of interest to say on all the topics he takes up, particularly as to the historical role Christianity had to play in the scientific revolution. The book will arouse the interest of any reader who will allow for the occasional difficulty of the author's style.