Controversy had raged for decades. The Mechanists had their own Galacticist faction, who struggled to grasp the mind-shattering physics of the sinister Hijack Boosters. The Boosters, like the Investors, possessed a technique of faster-than-light travel. The Investors were willing to sell their secret, but only at a crippling price. The Hijack Boosters mocked mankind but were occasionally indiscreet.