It is an anti-imperialism moment in the book, but Lewis means more than that. Humans on their own are incapable of living in peace with others or with themselves. We cannot trust the universe to provide our needs, nor accept any limits on our growth. The Weston speech is reminiscent of Daniel Quinn’s book Ishmael, which makes this same point about surplus agricultural life. Quinn is making a kind of anthropological argument while Lewis is speaking theologically.
Here is the root of global warming and the culture of denial. It cannot be true that there are to be limits on us. (No doubt some readers are asking themselves how religion can be of help when this engulfing civilization that has created the crisis is Christian at its origin and still Christian in many ways. Lewis would scoff at the notion that
But for the weakness, you need only look at Lewis’ attempt to re-tell and update the Fall of humanity in the second book of the Planet trilogy—Perelandra. As made literal, the story is boring, ridiculous and irrelevant. The book makes you happy that Eve ate the fruit. And it reminds you why you are a secularist.