Bolivar Trask was an anthropologist who saw the rise of mutants as a threat to humanity. Bolivar was the father of Larry Trask, ironically revealed to be a mutant precognitive. Bolivar had realized this, and gave his son a medallion which suppresses his power. Bolivar is also the father of Tanya, a mutant whose ability to travel through time causes her to vanish but is rescued by Rachel Summers in a far future and become a part of the Askani under the alias Madame Sanctity. Tanya's travels through time would result in property damage to Trask's land. This mysterious situation would only further cement his attitudes.
Bolivar decides that humanity has to fight back against the mutants and develops robotic guardians for humanity, known as the Sentinels. Larry was shielded from the Sentinels' ability to detect mutants due to the medallion Bolivar had given his son. Bolivar publishes articles on the threat of mutants. One of these articles showed an illustration of mutant overlords keeping humans as slaves. This illustration would become a symbol for human/mutant relations and several years later Quentin Quire and his Omega Gang would base their appearance on this picture.
Professor Charles Xavier invites Trask for a public debate on human/mutant relations. Xavier argues that mutants are just like humans and not evil, but that does not convince Trask revealing the Sentinels. But Trask and his scientists had apparently created a too adaptive, open-ended tactical/strategic programming, and as a result the Sentinels turn against him, claiming that they were superior to humans. The Sentinels left with Trask and brought him to his first creation, the Master Mold, who orders him to construct more Sentinels.