A culture is defined by many things.. A language, a religion, a way of life, a racial identity, these and more tie together in an identity that define us. As these ideas are shared by a worldwide communications network, as so many emigrate from homelands wracked by war or economic strife these cultural identities are increasingly mixed and exchanged. Increasingly our modern world is converging on a single common culture.
While this process has been slowly occurring since the Age of Exploration and the dawn of worldwide trade, it has more recently been pushed into hyper-drive by the communications revolution created by the internet. In a historical instant almost anyone, living anywhere has access to and can interact with people across the globe. For recent generations this is now taken for granted and not just available, but a regular occurrence that is an integral part of everyday life.
While many may see a set of dominant cultures developing, I would argue that there is really a single globe spanning culture that will result. There are a number of poles within this culture, driven by the major regional cultures, but increasingly there is a common set of values that are beginning to define a single entity.
The first culture to enter this new sphere was Anglo-American, home to the developing communications technologies that began the worldwide net. Being first on the scene allowed American culture to set the ground rules, to perform the first experiments in how these new communications possibilities could be used.
American culture is still dominant, but is increasing rivaled by the other major cultures. European, Latin American, and several Asian cultures have created their own spheres within the network. While somewhat isolated by language, or deliberate governmental restrictions, there is a great deal of interaction. Good, or often bad ideas that originate in one sphere spread to the entire network with increasing rapidity.