Eric Charles Vincent

Eric Charles Vincent was a petty criminal who was killed in the sinking of the RMS Lusitania on 7 May 1915.

In an alternative timeline in which the Lusitania did not sink, he killed Alexander Fleming in a botched robbery attempt before the biologist discovered penicillin. Without the protection offered by penicillin, Earth fell prey to meningitis and pneumonia in 1956. The survivors never developed a space programme. (BFA: The Sirens of Time)