noun

the tendency to lay down principles as undeniably true, without consideration of evidence or the opinions of others.

a culture of dogmatism and fanaticism

opinionatedness,peremptoriness,assertiveness,imperativeness,doctrinairism,authoritarianism,imperiousness,high-handedness,arrogance,dictatorialness,inflexibility,rigidity,entrenchment,intolerance,narrow-mindedness,small-mindedness,bigotry