The global brain is a metaphor for the planetary ICT network that interconnects all humans and their technological artifacts. As this network stores ever more information, takes over ever more functions of coordination and communication from traditional organizations, and becomes increasingly intelligent, it starts to resemble a brain for the planet Earth.
Emergentism focuses on the emergent aspects of the evolution and development of complexity, including the spiritual, psychological, and moral-ethical aspects of the global brain. This is at present a particularly abstract and speculative domain. The global brain is here seen as a natural and emergent process of planetary evolutionary development. Here again Pierre Teilhard de Chardin attempted a synthesis of science, social values, and religion in his The Phenomenon of Man, which argues that the telos (drive, purpose) of universal evolutionary process is the development of greater levels of both complexity and consciousness. Teilhard proposed that if life persists then planetization, as a biological process producing a global brain, would necessarily also produce a global mind, a new level of planetary consciousness and a technologically supported network of thoughts which he called the noosphere. Teilhard’s proposed technological layer for the noosphere can be interpreted as an early anticipation of the Internet and the Web.
Physicist and philosopher Peter Russell elaborates a similar view, and stresses the importance of personal spiritual growth, in order to build and to achieve synergy with the spiritual dimension of the emerging superorganism. This approach is most popular in New Age circles, which emphasize growth in consciousness rather than scientific modeling or the implementation of technological and social systems.
(Extracts from Wikipedia)