The surnames of the criminal and the poor, of course.
Greg Clark provides new evidence for the "survival of the richest"
here (and he thanks
Nick Wade for the idea). From the abstract:
[E]vidence from...surnames...again shows the takeover of English society by the economically successful between 1600 and 1851, and the disappearance of the criminal and the poor. A man's economic success in pre-industrial England predicted a permanent increase of his surname frequency, and hence his gene frequency, by 1851.
Confession: I, for one, had no idea that Elvis was a surname.
Clark's papers have familiarized economists with the basics of genetics. It seems to be paying off: At the
American Economic Association meetings this year, there was a session on
brain evolution in the very long run, another on
genetics and microeconomic behavior, and a third
GNXP-friendly session where Clark presented the above-quoted paper.