It is in connection with the deliberate effort of the skillful demagogue to weld together a closely coherent and homogeneous body of supporters that the third and perhaps most important negative element of selection enters. It seems to be almost a law of human nature that it is easier for people to agree on a negative program—on the hatred of an enemy, on the envy of those better off— than on any positive task. The contrast between the “we” and the “they,” the common fight against those outside the group, seems to be an essential ingredient in any creed which will solidly knit together a group
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