Uncertainty

His six colleagues — each representing one of the members of the United Planets — were all present in the flesh. They had to be; electronic diplomacy was not possible over solar-system distances…

A hundred years earlier, a much poorer world, with far feebler resources, had squandered its wealth attempting to destroy weapons launched, suicidally, by mankind against itself. The effort had never…

What did depress him sometimes was the need for dealing, year after year, with the same familiar faces. The marvels of medicine were all very well — and certainly he had no desire to put back the…

Yes, Mr. Ambassador, I think I have some information of interest. What we have here is undoubtedly a 'space ark.' It's an old idea in the astronautical literature. I've been able to trace it back to…