Well, here is a quote from C. S. Lewis's The Abolition of Man in which he sounds just like the guy in the cartoon.
must be the destruction of the society which accepts it."
(C. S. Lewis, The Abolition of Man, p. 27)
Yes, you read that right: C. S. Lewis is saying that any society which educates its young people by debunking the notion of objective value will thereby destroy itself. Lewis argues in this prophetic book that there is such a thing as value (goodness, truth, beauty) in objects themselves totally apart from our subjective evaluations of those objects. What he calls "The Green Book" is a high school English textbook that teaches relativism in the course of teaching English composition. He actually thinks that such books are destroying our culture.
But then, he is an Augustinian who accepts the Platonist-Christian synthesis that dominated the church for well over a millennium until the decline in realist metaphysics and the rise of nominalism in the later part of the high middle ages (Christendom) prepared the way for the rise of Modernity. He believes that the Divine Logos which created the world left the imprint of his rationality upon it and, since we bear the Divine image, we can rationally understand some of the truth about reality and we can discern the good and the beautiful, despite our having fallen into nature and the consequent loss of some of our rational capacity.
Lewis believed that value is not merely subjective. In The Abolition of Man he talked about the Tao, the common core of moral value held in common by Plato, Aristotle, Confucianism, Hinduism, Christianity and Judaism. The lectures published in this book were delivered to a secular audience so he avoided excessive reliance on terms usually associated with one religious tradition. But he is clearly talking about what the Western tradition has referred to as "natural law." Lewis ends chapter 2 by raising the question as to whether or not traditional morality can be retained by a society that rejects all supernatural bases for it.
Lewis does not answer this question due to the context of his lectures but it is clear that he thinks it cannot - at least not in Europe. Europe has been Christian for two millennia and it has no other soul or religion. It is either Christianity or secularism for Europe and Lewis argues that the relativistic, subjectivist secularism of mid-twentieth century Britain is an insufficient basis for traditional morality.
But to say it is an "insufficient basis" is not strong enough. Lewis is literally predicting the fall of Western civilization if it does not regain its soul, that is, if it does not experience a widespread and profoundly deep revival of the Christian religion in the near future. One senses without difficulty that the hour is much later than when he wrote these words in 1944 and that his prediction is coming true rapidly. A widespread and sincere acceptance of relativism spells the doom of the society that sinks to this state.
When a mild-mannered, Oxford don pulls on the burlap and digs out his "The End is Near" sign, it might be time to sit up and take notice.