Pitbull dogs today have their origins in XIX century Britain, but its history goes back to Roman times.
This breed descended from dogs fighting molosos, originally used for fights against bulls and bears. With the ban of these fights in England, the fans of these "sports" began to breed dogs to make them lighter fighting among themselves. There appears to be used terrier type dogs, thus greater agility without losing the fight.
The pitbull was recognized at any time by the American Kennel Club (AKC), but was later removed from their records because the institution did not want the bad press brought with it a fighting race. The people that love the dogs in Americans developed a new race from the pit bull then, the American Staffordshire Terrier.
Currently, the pitbull is recognized by some organizations, as the UnitedKennel Club and the American Dog Breeders Association, but is not recognized bythe FCI (FCI) or by the AKC. However, some entities affiliated with the FCIrecognized the breed, as is the case of the FCI Argentina.
Today the race is considered one of the dangerous breeds, but it remains one of themost popular around the world.