THE WORLD IS MULTICULTURAL, as are most of the states that make up the international community. People within national boundaries have diverse origins, languages, religions, histories, and traditions. This variety is often compounded by shifting national boundaries which are a result of warfare, conquest, liberation, and the break-up of empires - a process still actively affecting the character of states in the former communist world. In the more settled politics of the developed world, change increasingly reflects international migration. But growing political awareness among long-established minorities which either lost their identities or were prepared to submerge them within confines established by the dominant majority also effect change. Most nation states have devoted educational and cultural resources to homogenizing a 'national identity' which is now under challenge from recent trends.Australia, Britain, Sweden, and Canada are among the oldest democracies. This did not prevent them from seeking cultural uniformity in the past, a process which was easiest for Sweden but involved draconian policies towards Aboriginal people in Australia, language repression in Britain, and constant tension in Canada between the two founding nations of anglophones and francophones. Although these policies have rarely been as drastic as the genocide or ethnic cleansing found in Europe, parallels have been drawn by minority activists, especially in relation to Australian Aboriginal affairs and to the tortured relationship between Britain and Ireland. All four societies have experienced discomfort in integrating immigrants and refugees, despite official initiatives designed to control and to accommodate new arrivals.(f.1) As in the United States, which exerts an influence on all of them, arguments about multiculturalism, assimilation, immigration, and tolerance influence political debate and will continue to do so.INDIGENOUS ESTABLISHED AND IMMIGRANT MINORITIESEthnic groups vary greatly in their definition, character, and role in society. In political terms they are always seen as minorities, even when they form a numerical majority in some regions. Because ethnicity embraces cultural difference, it must remain an elastic description. Cultures change rapidly in an era of mass education and mass media. Immigrants cease to be like those they left behind and are often confused and disappointed when they return 'home' to a society they no longer recognize. Their children may or may not be attached to the parental culture; after all, many children of the majority turn against their parental inheritance. Deliberate efforts to force aboriginal populations to assimilate have radically changed their cultures and often fractured their social structure. In a multi-ethnic society, cultural isolates such as the Old Order Amish in Ontario are rare. Assimilation, syncretism, cultural blending, and confusion are the common experience.Yet many of those in multi-ethnic situations continue to classify others as different even as they make excuses for individuals known to them personally. At the extreme this leads to organized racism, currently most virulent - though still marginal - in Britain. More commonly, it produces the 'I am not a racist but' preface to an argument about cultural incompatibility or the need to control immigration or to educate children to be 'real' Australians, Britons, and so forth. In political reality the perception among citizens is that ethnic groups exist even if they exclude themselves from membership. Usually they rank differences on a scale of acceptability based on 'distance' from themselves. Thus English-speaking immigrants have always been acceptable in Australia, and (if white) were able to enter without effective control until the 1960s, as are Nordic immigrants to Sweden.Public policy reflects this widespread perception of ethnic variety and cultural distance. While each state determines ethnic categories in the light of its own history and experience, some broad categorization is helpful in distinguishing among ethnic groups in terms of their impact on public policy. …