Noosphere (pronounced /ˈnoʊ.ɵsfɪər/; sometimes noösphere), according to the thought of Vladimir Vernadsky and Teilhard de Chardin, denotes the “sphere of human thought”. The word is derived from the Greek νοῦς (nous “mind“) + σφαῖρα (sphaira “sphere“), in lexical analogy to “atmosphere” and “biosphere“.

In the original theory of Vernadsky, the noosphere is the third in a succession of phases of development of the [...]