That might have been logical. But mankind went a little crazy when Earthmother was threatened. Belters herded cities of millions into the paths of hurling iceballs, just to save a heavy world they had only known from books and a faint blue twinkle in the blackness. The psychists took a long time to understand why. At the time it seemed like some sort of divine madness.

Finally the war was won. The comets were tamed and we started looking outward again. New starships were built, better than before.

I had to wait for a berth on the twelfth ship, and the wait saved my life.

The first seven ships were lost. As they beamed back their jubilant reports, spiraling closer to the beautiful green worlds they had found, they plowed into unseen crystalspheres and were destroyed.

And, unlike Seeker, they did not accomplish anything by dying. The crystalspheres remained after the ships had been icecrushed into comets.

We had all had such hopes… though those who remembered Seeker had worried quietly. Humanity seemed about to breathe free, at last! We were going to spread our eggs to other baskets, and be safe for the first time. No more would we fear overpopulation, crowding, or stagnation.

And all at once the hopes were smashed—dashed against those unseen, deadly spheres.

It took centuries even to learn how to detect the deadzones! How, we asked. How could the universe be so perverse? Was it all some great practical joke? What were these monstrous barriers that defied all the physics we knew, and kept us away from the beautiful littleworlds we so desired?

For three centuries, humanity went a little crazy.

I missed the worst years of the greatdepression. I was with a group trying to study the sphere around Tau Ceti. By the time I got back, some degree of order had been restored.