The world economy has become so integrated that shoppers find relatively few T-shirts and sneakers in Wal-Mart and Target carrying a “Made in the U.S.A.” label. But globalization may be losing some of the inexorable economic power it had for much of the past quarter-century, even as it faces fresh challenges as a political ideology.

Cheap oil, the lubricant of quick, inexpensive transportation links across the world, may not return anytime soon, upsetting the logic of diffuse global supply chains that treat geography as a footnote in the pursuit of lower wages. Rising concern about global warming, the reaction against lost jobs in rich countries, worries about food safety and security, and the collapse of world trade talks in Geneva last week also signal that political and environmental concerns may make the calculus of globalization far more complex.


“If prices stay at these levels, that could lead to some significant rearrangement of production, among sectors and countries,” said C. Fred Bergsten, author of “The United States and the World Economy” and director of the Peter G. Peterson Institute for International Economics, in Washington. “You could have a very significant shock to traditional consumption patterns and also some important growth effects.”

The cost of shipping a 40-foot container from Shanghai to the United States has risen to $8,000, compared with $3,000 early in the decade, according to a recent study of transportation costs. Big container ships, the pack mules of the 21st-century economy, have shaved their top speed by nearly 20 percent to save on fuel costs, substantially slowing shipping times.