It is correct to say that one consequence of this evolutionary development will be the achievement of emotional harmony among mankind through mutual goodwill. But this is not the same as the achievement of intellectual unity, of perfect identity in view and attitude. This is impossible and unattainable. Each human ego has its own peculiarities, its own unique experience and its own psychological differences. No two are the same. Harmony as an ideal relation and ethical goal, yes, but unity as a necessary prerequisite of it, no!
-- Notebooks Category 13: Human Experience > Chapter 4: World Crisis > # 247