In that case, most powerful is she who has herself in her own power, plus the greatest number of other people.
(I opt for Eliezer's coin flip method of gender-neutral pronoun usage, by the way.)
In that case, most powerful is he who has herself in his own power, plus the greatest number of other people.
Rephrased using an honest coin.
Here's the new thread for posting quotes, with the usual rules: