The "circle of opportunity" refers to President Bush's proposal in 2003 for a US-Middle East free trade agreement. Lawrence (trade and investment, John F. Kennedy School of Government, Harvard U./senior fellow, Peterson Institute) discusses the current state of Arab economies and trade linkages, and the broader implications of trying to globalize this troubled region. He argues that liberalizing services trade and foreign investment, as well as the effects of eliminating tariffs on goods, must be taken into account. Tables present relevant data. Annotation 2007 Book News, Inc., Portland, OR (booknews.com)