Who could deny that privacy is a jewel? It has always been the mark of privilege, the distinguishing feature of a truly urbane culture. Out of the cave, the tribal teepee, the pueblo, the community fortress, man emerged to build himself a house of his own with a shelter in it for himself and his diversions. Every age has seen it so. The poor might have to huddle together in cities for need's sake, and the frontiersman cling to his neighbors for the sake of protection. But in each civilization, as it advanced, those who could afford it chose the luxury of a withdrawing-place.