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The ideosphere—like the noosphere (i.e., the realm of reason)—is the metaphysical 'place' where thoughts, theories, ideas, and ideation are regarded to be created, evaluated, and evolved.
Analogous to the biosphere (the realm of biological evolution), the ideosphere is the realm of memetic evolution, where 'memes' take the role of biological genes.[1][2] As such, the ideosphere is an entire memetic ecology: the collective intelligence of all humans wherein memes live, reproduce, compete, and mutate.[1][3][4]
The health of an ideosphere, in this sense, can be measured by its memetic diversity.[1] Moreover, like the biosphere, it has ecological niches, which serve as environments for groups or audiences.[3] For instance, some entities compete for ecological niches in the ideosphere, such as Buddha, Laozi, the kami of Shinto, Satan, Jesus Christ in Christianity and in other religions, etc.[5]:851 Another example, an ideosphere is formed around a linguistic system that involves a mixture of cynicism and sentimentality as well as the violent appropriation of the other's word.[6]
Douglas Hofstadter and Aaron Lynch are considered to have independently co-invented the term ideosphere in the mid-1980s.[2][3][7][8]
The ideosphere is not considered to be a physical place by most people; instead, it is "inside the minds" of all the humans in the world. It is also sometimes believed that the Internet, books, and other media could be considered to be part of the ideosphere—however such media lack the ability to process the thoughts they contain.
哲学者木村康彦によれば、イデオ圏は「同心円状」の形態をしており、少数の人々によってアイデアが生み出され、他の人々は単にこれらの「外部の権威」からこれらのアイデアを認識し受け入れるだけである。[ 9 ]彼は、すべての個人が新しいアイデアを生み出し、自己権威として相互作用する「全方位的」な構成を提唱している。人類の大部分はアイデアの生産者ではなく消費者のままであるという考え方がある。[ 9 ]これに対処するために、木村は、十分な数の真正で独立した思想家の出現によって生み出される相乗効果によって引き起こされる、いわゆるイデオ圏の変革を提案した。[ 3 ]