First, Émile Durkheim showed that human beings move up and down between two levels: the profane and the sacred. The profane is our ordinary self-focused consciousness. The sacred is the realm of the collective. Groups of individuals become a cohesive community when they engage in rituals that move them in and out of the realm of the sacred together. The virtual world, in contrast, gives no structure to time or space and is entirely profane. This is one reason why virtual communities are not usually as satisfying or meaning-giving as real-world communities.