For decades, apparel production has been a key tool for helping developing nations pull themselves into the industrial world. That’s made access to the huge U.S. consumer market a main negotiating point for international trade deals, from rebuilding Japan’s economy after World War II and the creation of NAFTA to China entering the World Trade Organization and Pakistan seeking favors for its alliance against the Taliban. But trade with developing nations, where wages and worker rights pale with U.S. standards, has also led to intense scrutiny and criticism, most recently seen at the World Economic Forum in New York.