Before the foundation of IFK Göteborg, the dominant club in the Gothenburg area was Örgryte IS, which was considered a middle and upper class club. IFK became popular amongst the working class, creating a fierce rivalry based upon both local pride and social class. In the early 20th century, supporters were supposed to act as gentlemen, applauding and supporting both their own team, and the opponents. However, this proved a hard task for supporters of the Gothenburg teams. Local patriotism and class differences sometimes resulted in fights and pitch invasions, making the Swedish press view IFK and Örgryte fans as the scum of Swedish football.