Postbiological evolution is a form of evolution which has transitioned from a biological paradigm, driven by the propagation of genes, to a nonbiological (e.g., cultural or technological) paradigm, presumably driven by some alternative replicator (e.g., memes or temes), and potentially resulting in the extinction, obsolescence, or trophic reorganization of the former. Researchers anticipating a postbiological universe tend to describe this transition as marked by the maturation and potential convergence of high technologies, such as artificial intelligence or nanotechnology.
The dictionary definition of Evolution is any process of formation, growth or development. In biological evolution the main principle behind this development is survival, we evolved to become stronger and quicker, we also evolved to become intelligent. But as we became intelligent biological evolution subsided to a new concept, cultural evolution. Cultural evolution moves at a much faster rate than biological evolution and this is one reason why it isn't very well understood. But as survival is still the main driving force behind life and that intelligence and knowledge is currently the most important factor for that survival, we can reasonably assume that cultural evolution will progress in the direction of furthering intelligence and knowledge.
Cultural evolution progressing in this way and being based upon the furthering of intelligence is known as the Intelligence Principle; this was suggested by Dr Steven J Dick.
"The maintenance, improvement and perpetuation of knowledge and intelligence is the central driving force of cultural evolution, and that to the extent intelligence can be improved, it will be improved" (Dick 1996)
If cultural evolution progresses in this direction then due to cultural evolution being much faster than biological, the limiting factor becomes our biology and the capability of our brains. Currently the closest and so most probable solution to this problem is artificial intelligence, (AI). Experts in AI even believe it holds the potential and capability for a postbiological earth in the next several generations, (Moravec 1988, 1999). AI could be utilised to solve scientific problems and to analyse situations much faster and more accurately than our own minds.