Noosphere
A concept introduced by Pierre Teilhard de Chardin in the 1920s: the layer of thought enveloping the planet, formed by all connected human consciousnesses.
The noosphere is, in the thought of Pierre Teilhard de Chardin, the layer of thought enveloping the Earth — the equivalent, for consciousness, of what the biosphere is for the living. It is made of all human thoughts, of their traces, of their interactions; it densifies as humanity becomes more connected.
The term appears in the 1920s in the exchanges between Teilhard, Édouard Le Roy, and Vladimir Vernadsky. It was long received as a mystical metaphor, tied to Teilhard’s cosmic Christianity and to his Omega Point toward which evolution would converge.
Reading from the manifesto
The manifesto takes up the concept of the noosphere but strips it of its mystical horizon to give it a concrete and present scope. Teilhard imagined the noosphere as a passive layer — the sum of human thought, with no agency of its own. The manifesto holds that with generative AI, this layer ceases to be passive. It folds back on itself, condenses, begins to speak in return. It becomes what the manifesto calls a cognitive noosphere.
This shift is not a forced reading of Teilhard; it is an update made necessary by a new fact: humanity had never had a channel to converse with its own corpus.