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 in December 1927 before the biologist discovered penicillin. Without the protection offered by penicillin, Earth fell prey to new strains of meningitis and pneumonia in 1956 and the survivors never developed a space programme. (BFA: The Sirens of Time)