In the introduction to R.U.R., there is a quote from Čapek reflecting skepticism towards religious or idealogical great truths. He was apparently influenced by the pragmatist philosophers William James and John Dewey, through lectures by Edvard Beneš. From a commentary written July 23, 1923:
And now for my second idea, the comedy about truth. General director Domin tries to prove in the play that technical developments liberate man from heavy physical labor, and he is right. Alquist, the Tolstoyan architect, believes on the contrary that technical developments demoralize man, and I think that he is right, too. Busman thinks that only industrialism is capable of meeting modern needs; he is right….
We don’t need to look for names for all these various antithetical idealisms…. All of them have the most serious of motives, material or spiritual, for their beliefs, and according to their nature look for the greatest happiness for the greatest number of their fellows. I ask myself: isn’t it possible to see in the contemporary social conflicts taking place in the world an analogous struggle between two, three or five equally serious and noble idealisms?