“The Chapter Ends,” Poul Anderson, 1953 — A posthuman captain tries to convince a traditionalist to leave earth. Aliens have made a compact with the now mani-formed “humans” to vacate Earth and reside elsewhere. A stubborn man is willing to become the last man on earth. Once he realizes he’s been left behind, his “connection” to the soil, to his home and land, can’t assuage the sudden horror of complete isolation from the “human” community.
Comments: Read in Supermen: Tales of the Posthuman Future, ed. Gardner Dozois. Dozois states that this is an early story exemplifying the gulf between traditional “human” and posthuman, and how this difference might trend toward a greater gulf over time.
Author: Wikipedia: “Poul William Anderson (November 25, 1926 – July 31, 2001) was an American science fiction author who began his career during one of the Golden Ages of the genre and continued to write and remain popular into the 21st century.”