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.