I don't think there's just one successful game theory strategy.
Do unto others as you would have them do unto you.
is a kind of a planning-ahead strategy if you believe that others
are going to use tit for tat. Maybe?
And besides, I'm talking about a strategy that is beneficial to the group
(and to group members indirectly thereby. Not a strategy that is most
beneficial on average to the individual at each encounter.
Frank wrote:
Actually, the successful game theory strategy is tit for tat
which would be quivalent to: an eye for an eye