A girl got kicked out of the swimming hole today. Inge Hachmann. They said they wouldn't let us swim with a half-breed. Unsanitary. A half-breed, Werner. Aren't we half-breeds too? Aren't we half our mother, half our father?

I see this as the central issue of our time: how to find a substitute for war in human ingenuity, imagination, courage, sacrifice, patience...War is not inevitable, however persistent it is, however long a history it has in human affairs. It does not come out of some instinctive human need. It is manufactured by political leaders, who then must make a tremendous effort--by enticement, by propaganda, by coercion--to mobilize a normally reluctant population to go to war.

She watched the tunnels as they flowed past: bare walls of concrete, a net of pipes and wires, a web of rails that went off into black holes where green and red lights hung as distant drops of color. There was nothing else to dilute it, so that one could admire naked purpose and the ingenuity that had achieved it.