Tarde was explicit about the role of desire in imitative propagation. Desire, for Tarde, was not a subjective state peripheral to social analysis. It was one of the two fundamental social forces — the other being belief. People imitate not primarily because they have calculated that imitation will serve their interests but because they desire to be like those they admire, to possess the capabilities, the status, the qualities the admired source represents. The desire is not reducible to rational self-interest. It is a social force in its own right, operating through channels economic analysis cannot map because economic analysis presupposes the rational agent that desire repeatedly and demonstrably overrides.
The aesthetic dimension of AI adoption deserves particular attention because it is the extra-logical influence that is least acknowledged and most powerful. The output of a large language model is, by design, aesthetically appealing — fluent, well-structured, free of the hesitations and infelicities that characterize first-draft human prose. This aesthetic quality is not peripheral. It is the primary mechanism by which the tool recruits new users. The first encounter with AI-generated text produces an aesthetic response — recognition that the output is better-written, more polished, more immediately impressive than what the user could produce unassisted — and the aesthetic response activates the imitative reflex. The desire to produce beautiful output drives adoption more powerfully than the desire to produce correct output, because beauty is immediately perceptible and correctness requires slower, more effortful evaluation.
The productive addiction Segal describes — the inability to stop building, the compulsive engagement with the tool the Berkeley researchers documented — is an extra-logical phenomenon the Tarde framework illuminates. The addiction is not to the tool's utility. It is to the feeling the tool produces: the feeling of flow, of expanded capability, of a self larger and more competent than the self that existed before adoption. The feeling is a compound of desire (to produce, to build, to realize imagined things) and belief (that the tool makes possible what was previously impossible, that the practice endorsed by prestigious sources is legitimate and valuable). Desire and belief operating together produce imitative momentum that carries the practice far beyond territory rational evaluation alone would authorize.
Tarde articulated the extra-logical forces across Les Lois de l'imitation (1890), La Logique sociale (1895), and L'opposition universelle (1897). He drew on courtroom observations, fashion propagation, religious revival patterns, and criminal technique transmission — consistently finding that rational explanations of adoption decisions systematically failed to predict or explain actual propagation dynamics. The extra-logical forces were not residual variables in a rational model; they were the primary forces, with rational calculation as the secondary rationalization.
Desire and belief are primary social forces. Not derivatives of rational self-interest but independent engines of imitative propagation operating beneath deliberate choice.
Aesthetic response drives adoption. The beauty of an imitated pattern activates the imitative reflex more reliably than the pattern's demonstrated utility.
Feelings precede evaluations. Adoption decisions are made on extra-logical grounds and subsequently rationalized through cost-benefit narratives that post-date the actual decision.
The forces are indiscriminate. The same mechanisms that carry beneficial practices carry harmful ones — the extra-logical forces do not distinguish between imitations that improve life and imitations that erode it.
Discrimination requires deliberate opposition. Only the deliberate exercise of evaluative judgment can separate beneficial imitations from harmful ones; the propagation dynamics themselves provide no filter.