Childhood's End 1400-1600

Sixty years after the Overlords' arrival, human children, including the Greggsons', begin to display telekinetic powers. Karellen reveals the Overlords' purpose; they serve the Overmind, a vast cosmic intelligence, born of amalgamated ancient civilizations, and freed from the limitations of material existence. Yet the Overlords themselves are strangely unable to join the Overmind, but serve it as a bridge species, charged with fostering other races' eventual merger with it. Because of this, Karellen expresses his envy of humanity.