The document discusses the evolution of branding and selling propositions from the 1950s to present. It begins with the Unique Selling Proposition (USP) focused on physical products in the 1950s. By the 1960s, brands started developing Emotional Selling Propositions (ESP) that created emotional attachments. In the 1980s, the Organizational Selling Proposition (OSP) emerged where the organization or corporation became the brand. By the 1990s, brands had grown so strong that the Brand Selling Proposition (BSP) took over, with the brand being stronger than the physical product. The document provides references for further research on user experience design and methods.