Undershaft has made it very clear that he doesn’t believe in the Christian god. Yet he is, as he claimed earlier, a mystic in his staunch belief that there is some sort of higher principle or power ordering the universe. And he’s just as much of an evangelist as his daughter. But while Barbara wants to convert people to a heartfelt and true practice of Christianity, he wants to show people that there’s a better way to organize society, one that acknowledges reality rather than trying to use religious ideas to cover up distasteful or distressing truths. In his view—and the play’s—the fact that capitalist societies worship wealth is less problematic than the fact that they try to hide this truth and end up oppressing some people by allowing them to remain poor. If such societies acknowledged their worship of wealth openly, as Undershaft has done, then they might have a hope of reordering themselves in a more just and less abusive way. And only once people are free from poverty—as Barbara has always been—can they wholeheartedly turn their minds to spiritual affairs.