The UFC was started as a tournament to find the world's best fighter, no matter their style, and was based upon Brazilian vale tudo fighting. Although there was a limited number of rules, the UFC was initially known as no holds barred fighting and contests were often violent and brutal. Early UFC fights were less sport than spectacle, which led to accusations of brutality and "human cockfighting" by opponents. Political pressures eventually led the UFC into the underground, as pay-per-view providers nixed UFC programming, nearly extinguishing the UFC's public visibility.