Focusing on the global diffusion of the “A” list consisting of predominantly U.S.-based journals, we argue that such diffusion represents an important form of professionalization in the management of business schools. The diffusion can also be viewed as an intellectual movement in the age of global competition characterized by a flat world. How can we explain the recent diffusion of the “A” list? More important, how does such diffusion impact the future of business and management scholarship? Addressing these important but underexplored questions, we identify the multilevel factors that explain the diffusion, and predict its likely trajectory and its impact on future scholarship.