" 'It is, brahmin, because of attachment to sensual pleasures, adherence to sensual pleasures, fixation on sensual pleasures, addiction to sensual pleasures, obsession with sensual pleasures, holding firmly to sensual pleasures that khattiyas fight with khattiyas, brahmins with brahmins, and householders with householders.' ... 'It is brahmin, because of attachment to views, adherence to views, fixation on views, addiction to views, obsession with views, holding firmly to views that ascetics fight with ascetics.' "

--Anguttara Nikaya