Jagdish Bhagwati, the internationally renowned economist who uniquely combines a reputation as the leading scholar of international trade with a substantial presence in public policy on the important issues of the day, shines here a critical light on Preferential Trade Agreements, revealing how the rapid spread of PTA's endangers the world trading system. Numbering by now well over 300, and rapidly increasing, these preferential trade agreements, many taking the form of Free Trade Agreements, have re-created the unhappy situation of the 1930's, when world trade was undermined by discriminatory