Over the last three decades anthropologists have again turned their at
tention to cities. This has transformed the model of anthropology buil
t on the study of non-European rural populations. It has also enabled
anthropologists to make their own particular contributions using ethno
graphy and qualitative research to investigate how cities have been tr
ansformed by the emergence of multicultural heterogeneity, hybridizati
on and intercultural and social segregation. A critical review of the
main urban theories demonstrates that it is important to consider the
cultural dimension of the urban experience in conjunction with the soc
io-economic aspects. To do so, cities should be categorized not only i
n terms of socio-spatial but also socio-communicational development, t
aking into account the role played by the mass media and information t
echnology in the internal integration of cities and their incorporatio
n into transnational networks. Lastly, we discuss how anthropological
practice can be restructured to encompass the new forms of racism, exc
lusion and social disintegration that form part of the picture in a la
rge number of megacities, in both metropolitan and peripheral countrie
s.