It used to be thought that globalization would flatten out cultural differences among countries and regions of the world, making it easier than ever for companies to move into foreign markets. According to a new study by the author and a colleague, however, cultural differences are greater today than they were 40 years ago, which explains why some major corporations have failed in their recent efforts to establish a foothold in new countries. Companies need to adapt, the author argues, and to that end in this article he presents a general model for global leadership in the face of cultural divergence.