(Magneto wants to kill Shaw, he's not a Hellfire club allie, but simply create a brotherhood who seems good to remains of the Helfire Club. Shaw dead and the remains gone in the brotherhood, we can stated it is defunct)
They were the first adversaries faced by the X-Men. They were instrumental in the Cuban Missile Crisis in 1962 where they were defeated. Erik Lehnsherr killed Shaw and invited the remaining members of the Hellfire Club to join him and Mystique in founding the original Brotherhood of Mutants.