I recently came across a word new to me; I’ll let Wikipedia explain it:
Stigmergy (/ˈstɪɡmərdʒi/ STIG-mər-jee) is a mechanism of indirect coordination, through the environment, between agents or actions. The principle is that the trace left in the environment by an action stimulates the performance of a next action, by the same or a different agent. In that way, subsequent actions tend to reinforce and build on each other, leading to the spontaneous emergence of coherent, apparently systematic activity.
Stigmergy is a form of self-organization. It produces complex, seemingly intelligent structures, without need for any planning, control, or even direct communication between the agents. As such it supports efficient collaboration between extremely simple agents, who lack any memory, intelligence or even individual awareness of each other.
The term “stigmergy” was introduced by French biologist Pierre-Paul Grassé in 1959 to refer to termite behavior. He defined it as: “Stimulation of workers by the performance they have achieved.” It is derived from the Greek words στίγμα stigma “mark, sign” and ἔργον ergon “work, action”, and captures the notion that an agent’s actions leave signs in the environment, signs that it and other agents sense and that determine and incite their subsequent actions.
Later on, a distinction was made between the stigmergic phenomenon, which is specific to the guidance of additional work, and the more general, non-work specific incitation, for which the term sematectonic communication was coined by E. O. Wilson, from the Greek words σῆμα sema “sign, token”, and τέκτων tecton “craftsman, builder”: “There is a need for a more general, somewhat less clumsy expression to denote the evocation of any form of behavior or physiological change by the evidences of work performed by other animals, including the special case of the guidance of additional work.”
I have several thoughts about this. It’s clearly a useful term, applicable to many kinds of things, so it’s good that Grassé created it (the OED entry, not updated since 1986, has this as its first citation: 1959 tr. P.-P. Grassé in Insectes Sociaux VI. 79 The stimulation of the workers by the very performances they have achieved is a significant one inducing accurate and adaptable response, and has been named stigmergy). It’s an ugly but well-formed word (in terms of its Greek derivation); the perceived ugliness will probably lessen as one sees it more and gets accustomed to it. The term sematectonic, on the other hand, is both ugly and unnecessary — the idea that because the Greek word ἔργον went into the makeup of stigmergy it must involve the concept of work and thus another word must be created for other uses is a typical example of the etymological fallacy, and I shake my fist in the general direction of E. O. Wilson (as I have done at other times for other reasons). At any rate, I will try to remember to make use of it when appropriate.
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