Courtesy Reuters

The 1990s will demand a redefinition of what constitutes national security. In the 1970s the concept was expanded to include international economics as it became clear that the U.S. economy was no longer the independent force it had once been, but was powerfully affected by economic policies in dozens of other countries. Global developments now suggest the need for another analogous, broadening definition of national security to include resource, environmental and demographic issues.

The assumptions and institutions that have governed international relations in the postwar era are a poor fit with these new realities. Environmental strains that transcend national

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