Political philosopher, is a Doctor of Philosophy from Oxford University and professor at Queen's University (Ontario, Canada). From a liberal defense of the rights of minority groups (whether poly-ethnic, immigrant and national minorities), their texts are essential to understand the current debate on multiculturalism. He is the author, among other books of multicultural citizenship, the political vernacular: nationalism, multiculturalism and citizenship and states, nations and cultures. He has recently published in this Editorial, territorial borders. an egalitarian liberal perspective (2006).