The author tries to demonstrate how a world society is emerging through new realities that are restructuring our contemporaries' societies. Two elements are considered essentials in the construction of that new reality: the development of a global imagination and the diffusion of a world culture. The author use the paradigm elaborated by Benedict Anderson on national identities to apply it at the world level. It is argue that «global challenges» and the elaboration of a «world time» constituted important elements demonstrating the development of a global imagination. Finally, the author explains how, through cultural hybridity and the production of common cultural products, the diffusion of a world culture is been achieved.