The art of leadership, as displayed by really great popular leaders in all ages, consists in consolidating the attention of the people against a single adversary and taking care that nothing will split up that attention into sections. The more the militant energies of the people are directed towards one objective the more will new recruits join the movement, attracted by the magnetism of its unified action, and thus the striking power will be all the more enhanced. The leader of genius must have the ability to make different opponents appear as if they belonged to the one category; for weak and wavering natures among a leader's following may easily begin to be dubious about the justice of their own cause if they have to face different enemies.