The North American Free Trade Agreement (NAFTA) dismantled barriers and nearly tripled trade and investment. However, it failed to address the development gap between Mexico and its northern neighbors, and it omitted any credible institutions to anticipate crises or shape a new partnership. Thus, instead of uniting to respond to Sept. 11 , old habits of U.S. unilateralism and Canadian and Mexican ambivalence prevailed, endangering further integration. We need to plan for the second decade of NAFTA by developing North American solutions to continental problems and opportunities. ...