Fantasy is toxic: the private cruelty and the world war both have their start in the heated brain.

Bowen’s aphorism treats “fantasy” not as harmless imagination but as a self-enclosed mental heat that detaches feeling from reality and responsibility. In that state, the mind can rehearse domination, grievance, or wish-fulfillment until it hardens into action. By linking “private cruelty” to “world war,” she collapses the scale difference between intimate harm and mass violence: both can originate in the same psychological mechanism—an inward, uncorrected narrative that licenses aggression. The line reads as a warning against indulgent inner dramas that bypass empathy and fact, suggesting that ethical life depends on keeping imagination answerable to the real world and to other people.