"A great deal has been written about Existentialism in recent years, but this work of Dr. Kingston’s seems to me to occupy a unique and important place, and this for two reasons. First, in my opinion he seems to raise those questions about the Existentialist movement which most immediately spring to the mind of any intelligent Christian who finds himself confronted with it. Is the movement a reaction against Christian orthodoxy as such, or is it an attempt to recover certain Christian insights which Christians themselves have largely forgotten? If it is the former, how are we to explain the Christian existentialists, such as Kierkegaard and Marcel? If it is the latter, how are we to explain the atheist and antitheist existentialists, such as Sartre and Simone de Beauvoir? Is it possible, in view of their radical opposition to consider Christian and atheist existentialism of the same genus? Or is it only by a misleading and equivocal use of words that the same label-“existentialism"-has been made to apply to both? And, granted that there can be a Christian existentialism, is it essentially Protestant or is there a genuinely Catholic type which can appeal to authentic, if perhaps partly forgotten, principles of traditional, and even Thomist, theology and philosophy?"