A world had collapsed around this man--a world that would never shout his praises again. The burned-out cities were still and dead, the twisted bodies and twisted souls giving him their last salute in death. And now he was alone, alone surrounded by memories, alone and waiting.
With no more room left on Earth, and with Mars hanging up there empty of life, somebody hit on the plan of starting a colony on the Red Planet. It meant changing the habits and physical structure of the immigrants, but that worked out fine. In fact, every possible factor was covered--except one of the flaws of human nature....
Two Timer in the February 1954 issue of Galaxy Science Fiction. Here is a brace of vignettes by the Old Vignette Master. short and sharp. like a hypodermic! - Experiment - Sentry