Long before George Lucas thought of making a prequel to Star wars, Julian May revisited the universe of her Pliocene Exile to tell us the origins of the story, though with a time line like this, the word origin is meaningless.
Meet Rogatien Remillard (Rogi for short - pronounced Rogue He) and his twin brother Donatien (Don). Born in late 1945, just months after Hiroshima, the two have a relatively normal childhood. Normal, that is, except for their developing mental powers and Rogi's regular visits from a mysterious, benevolent, invisible entity he dubs Le Phantome Familier - The Family Ghost.
As the twins mature, they take very diferent paths. Rogi, sterilised in his youth by the measels, acts as defacto father for his nephew Denis, raising him with love and teaching him to use his awesome mental gifts. Denis' father Don, scared by his sons potential takes to the bottle, and eventually learns to use his own mental abiliies for personal gain. Then, offended by his brothers "theft" of his firstborn, Don takes over the rearing of his second son Victor, teaching him all the malitious mental tricks he has perfected.
Denis, raised in love by his uncle, protected from his own fathers malice by his indomitable mental strength, becomes a paragon to psychics everywhere, devoting his life to further understanding humanities mental potential. Victor, corrupted from birth by his father, becomes a truly dark individual, wielding his awesome mental coercion for his own benefit, infiltrating the mafia, and eventually threatening the world. The two brothers carry the contrast between Rogi and Don to the next generation, and to the next level of mental ability.
Carefully observing it all, as they have for millenia, the pacifist psychic aliens of the Galactic Milieu await the maturation of the Human Mind, knowing as they do that it will be the most glorious Mind in the Glalaxy, and will enrich the Milieu fantastically. But nothing is certain, and humanity may follow the path of thousands of other races who failed - into self - annihilation.
Mankinds potential for Good, is matched only by its potential for Evil.