Not what the ruler says in his thundering speech that finally matters. The programs that the ruler is engaged with and the kind of people one finds around him .... that is the authentic measure of his real intelligence. Thus said Machiavelli the 16th Century Florentine philosopher of a Prince - a potential Ruler.
Are we any different from that measurement for an authentic leader or a CEO ( in a way, a ruler) in contemporary times ?
A good Ruler will has leaders from diverse backgrounds with courage to speak up ... and whose ultimate loyalty is to the purpose and not the power of the leader.