Overview
One of the most curious features of contemporary times is to be found in the existence of walls. I am thinking, of course, of a certain kind of "political" wall, often constructed from stones and bricks, frequently of barbed wire, and usually patrolled by silent armed men. Occasionally one hears the sounds of rifle shots along such walls, and less frequently world attention centers over a spot where some incident has taken place. In Germany we are familiar with one such wall: it encircles and cuts through the city of Berlin, and it slices north and south through the whole country. However, the German wall is not the only wall, indeed it is not even the most formidable. Consider China. In the neighborhood of China are at least three such walls: that between North and South Korea, that between the mainland and Taiwan, and that in the Vietnam area.
