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Our attitude toward our own culture has recently been characterized by two qualities, braggadocio and petulance. Braggadocio -- empty boasting of American power, American virtue, American know-how -- has dominated our foreign relations now for some decades. Here at home -- within the family, so to speak -- our attitude to our culture expresses a superficially different spirit, the spirit of petulance. Never before, perhaps, has a culture been so fragmented into groups, each full of its own virtue, each annoyed and irritated at the others.