Immigration as a framework in which to analyse the vast movements and interactions of people in the contemporary world tends to highlight recent movers and the legal apparatuses and ideologies of citizenship pertaining to them. Nation states, however, contain other, non-immigrant groups whose circumstances of arrival in many cases preceded nation states or a fully embordered globe, and who also need foregrounding if ethnocultural political sentiments and the deeper meanings of postmodern 'intermingling' are to be understood. Surveying a wide-ranging body of anthropological and historical studies of human migration and interaction over the past 150,000 years, a new synthetic framework is proposed. Contemporary nations all encompass diverse origins and arrivals that may be interpreted in terms of seven historically emergent and still ongoing processes: expansion, refuge-seeking, colonization, enforced transportation, trade diaspora, labour diaspora and emigration. Together they define the complex terrains upon which contemporary immigrants arrive.Rising tides in the movement of information, commodities and people characterize the contemporary world, and scholars have been vigorous in charting these proliferating forms of transnational circulation (: 2, 9) discerns 'a general rupture in the tenor of intersocietal relations [marking] the recent past (or the extended present)', and attributes this to, first, the impact of electronic media, and second, the pace and ubiquity of contemporary migration. Of the latter, he writes, 'few persons in the world today do not have a friend, relative, or co-worker who is not on the road to somewhere else or … coming back home' (Appadurai 1996: 4).By the year 2000 some 130 million human beings lived outside their nation of birth (Suarez-Orozco 2000). In social anthropology the dominant concept for investigating this massive intercourse of people has been immigration -the self-directed movement of individuals from one nation state to another (