One should not focus on the differences between people but look for commonality and similarity.
Theodore LevittA powerful force drives the world toward a converging commonality, and that force is technology. … Almost everyone everywhere wants all the things they have heard about, seen, or experienced via the new technologies.
Theodore LevittSelling concerns itself with the tricks and techniques of getting people to exchange their cash for your product. It is not concerned with the values that the exchange is all about. And it does not, as marketing invariable does, view the entire business process as consisting of a tightly integrated effort to discover, create, arouse and satisfy customer needs.
Theodore Levitt