Social scientists have not yet considered the role of world-level proc
esses that might explain ethnic movements. This article offers the arg
ument that the increasing integration of a world economic and politica
l system facilitates ethnic fragmentation within states. Two key proce
sses are related to integration of the world system: (a) increases in
the politics of ethnic inclusion: and (b) decreases in ethnic inequali
ty. Both contribute to the rise in ethnic protest in contemporary stat
es. Taken together these two processes suggest why core countries tend
to experience a greater number of ethnic protests that are more tempe
rate, whereas peripheral countries tend to experience only sporadic in
cidences of ethnic protest that are more likely to be confrontational
and violent.