Political changes were accompanied by social change and jockeying by various ethnic groups for increased power. The British and Dutch planters refused to accept the Portuguese as equals and sought to maintain their status as aliens with no rights in the colony, especially voting rights. The political tensions led the Portuguese to establish the Reform Association. After the anti-Portuguese riots of 1898, the Portuguese recognized the need to work with other disenfranchised elements of Guyanese society, in particular the Afro-Guyanese. By around the start of the 20th century, organizations including the Reform Association and the Reform Club began to demand greater participation in the colony's affairs. These organizations were largely the instruments of a small but articulate emerging middle class. Although the new middle class sympathized with the working class, the middle-class political groups were hardly representative of a national political or social movement. Indeed, working-class grievances were usually expressed in the form of riots.