The argument doesn’t specify how one achieves might. That’s an exercise for the reader. One guy sitting in a bunker with his finger over the red button of a doomsday weapon is rather mighty. A million people all working together in a coordinated hive mind would also be mighty.
The main issue for a group of humans is coordination. In general, smaller groups are easier to coordinate than larger groups. I think this is one of the biggest reasons elites can form and take control over larger groups in society. Wealth has a big effect too but this coordination problem has always existed and so have elites, at least since the dawn of agriculture.