This analysis adopts a long-wave perspective in order to shed light on the
dynamics that led to a global shift away from primary reliance on coal and
towards over-reliance on petroleum. It is argued that the interaction of th
ree systemic dynamics, those of geopolitical rivalry, commercial competitio
n, and social unrest, undermined the nineteenth-century international coal
regime and paved the way fur the consolidation of an international petroleu
m system in the twentieth century. By examining contemporary patterns of st
ate and private investments in a cluster of new energy technologies. as wel
l as the growing influence of environmental regulations, it is argued that
similar dynamics are beginning to favor a shift rewards a new, more sustain
able energy regime in the coming century. (C) 1999 Elsevier Science Inc.