You want to teach all kids the skills that are on the better side of human nature: empathy, appreciating how one's behavior is affecting other people, resolving disagreements in ways that do not involve conflict, taking another's perspective, honesty.
The so-called materialistic conception of history, with the crude elements of genius of the early form which appeared, for instance, in the Communist Manifesto, still prevails only in the minds of laymen and dilettantes.