Invention of the Plan
Foucault's PendulumInvention of the Plan is the collaborators’ deliberate assembly of a nonexistent universal conspiracy from existing texts, historical fragments, and associative links. Its decisive consequence is that the fabrication does not remain a private joke: the people who encounter it recognize their own scattered beliefs in its pattern, treat it as real, and begin acting as though it exists. The episode traces how a method of interpretation becomes a mechanism of belief—and how a plan invented to explain the world can acquire power over it.
From Parody to Habit
The Plan grows out of the group’s attempt to parody the reasoning of the Diabolicals. At first, they recognize that their connections are unwarranted shortcuts and would be ashamed to claim that they genuinely believed them. They collect material with what seems like the clear conscience of people preparing a burlesque. But the work continues between their meetings: they keep gathering fragments and practicing the act of connecting one thing to another. Repetition changes the game. Their minds become accustomed to making the links automatically, until the narrator recognizes that pretending to believe and learning to believe may become indistinguishable.
The narrator compares this conversion to spies who infiltrate an enemy service and acquire its way of thinking, or to people who attribute human emotions and motives to a dog until they have become like the creature they were interpreting. The comparison describes more than an intellectual error: the method remakes its practitioners. The narrator considers himself the least affected, partly because daily life with Lia and the baby anchors him outside the game. He later distinguishes their different degrees of involvement: he was becoming addicted, Diotallevi corrupted, and Belbo converted. All three, however, were losing the ability to distinguish resemblance from identity and metaphor from reality. That gradual loss supplies the psychological history behind the Plan’s invention: the method becomes dangerous before its makers admit that it has changed them.
The Rules of the Game
The narrator describes the source material as a laundry list that the group treated like a crossword with empty squares and no definitions. Unlike an ordinary crossword, whose intersecting words must share letters, their puzzle crossed concepts and events. The first rule was to connect concepts by analogy. Because almost anything could be connected to something else, each link could be made through a resemblance or association: a potato to an apple by shape and category, an apple to a snake by Biblical association, and onward through a chain of likenesses until it returned to the potato.
The second rule was that the chain had to hold together at the end. If the connections led back to their starting point, the circle counted as proof that the construction worked. The third rule required that the connections not be original: they had to have been made before, preferably many times, by others. Familiarity made a link seem obvious and therefore true. The Plan thus used repetition as a substitute for verification. It did not need a newly discovered fact; it needed a recognizable association that could be placed beside another association until the whole sequence appeared coherent.
That principle also shaped the group’s treatment of historical material. Signor Garamond’s idea was that the Diabolicals’ books should not innovate but repeat what had already been said, preserving the authority of Tradition. The three collaborators applied that principle to their own construction: they claimed to have invented nothing and only arranged the pieces. Colonel Ardenti had likewise assembled rather than originated his material, but his arrangement was clumsy and, in the narrator’s comparison, he possessed fewer pieces because he was less educated. The group’s advantage was not access to a hidden original design. They believed they had more fragments and could arrange them more cleverly.
An Invented Plan Becomes Real
The collaborators’ central discovery is that those who seek a grand design may already possess the fragments but lack the pattern that would organize them. The group supplies that pattern by joining fragments of muddled mythology into what appears to be a logical and irrefutable web of analogy, resemblance, and suspicion. The Diabolicals then identify their own material with moments in the collaborators’ construction. The conspiracy is fictional in origin, but its supposed participants come to believe that they have been part of it all along.
The narrator states the resulting reversal plainly: if a plan is invented and other people carry it out, it is as if the Plan exists; at that point, it does exist. Its reality is therefore not proof that the conspirators uncovered a hidden design. It is an effect of belief and action. The narrator anticipates that Diabolicals will swarm through the world looking for the map, because the collaborators have offered one to people who need their private frustrations to fit into a larger explanation.
That appeal is expressed through Belbo’s formulation that, if there really is a Plan, there can be no failure. A person may be defeated, but need not blame himself; he can understand the defeat as submission to a cosmic will and recast himself as a martyr rather than a coward. The Plan offers a way to escape personal responsibility by relocating failure inside an all-encompassing design. It also turns a lack of understanding into the conviction that some enemy must be responsible. In this way, the map offers order and exoneration at the same time.
The Social Need for Conspiracy
The Plan’s logic extends beyond the Diabolicals. The narrator relates it to the claim that a secret society plots to spread the rumor that a universal plot exists. In the more down-to-earth account that follows, people blame someone else for their failures, while dictatorships use an external enemy to bind their followers together. The Plan’s invented conspiracy can therefore be read both as a game of limitless connections and as a model of how political suspicion supplies an agent where chance, error, or shared responsibility would otherwise have to be faced.
The narrator applies the same reasoning to events such as stock-market crashes: a series of individual mistakes can combine into panic, but a person who cannot bear uncertainty looks for someone behind the event and asks who benefits. Guilt encourages the invention of plots to excuse a failure of understanding; those imagined plots then prompt people to organize counterplots. The explanation can become self-reinforcing, because opponents who also want power may confirm the accusations made against them. A conspiracy theory does not merely assign blame after the fact; it can teach its believers to imitate the conduct they condemn.
At the heart of this need is the hope for a secret that would dispel frustration or deliver salvation—or the belief that knowing the secret would itself be salvation. Yet the narrator argues that a revealed secret disappoints: each answer is treated as a veil concealing something more profound. The Plan feeds on that open-ended demand. Its connections can always be extended, and no final disclosure has to settle what the supposed design means.
The Empty Secret and Its Consequences
The narrator calls this an empty secret, not a final piece of concealed knowledge. Initiation, in his account, consists in never stopping the sequence of interpretation: one meaning leads to another, and the universe becomes an endless peeling whose center is everywhere and whose circumference is nowhere. A secret without content is powerful precisely because it can never be conclusively exposed, disproved, or possessed. It preserves the search by withholding the object that would end it.
This account retrospectively clarifies the confrontation before the Pendulum. Belbo claimed to possess a secret, and that claim gave him power over the people gathered there. Their first response—even Aglie’s—was to try to wrest it from him. The more Belbo refused to disclose it, and the more he insisted he had nothing, the more convinced they became that he possessed a genuine secret. His denial did not dissolve their belief; under the Plan’s logic, it strengthened it.
The search for the secret had held the Diabolicals together across excommunications, internal conflicts, and coups. Now, facing the possibility of learning it, they feared both that the answer would disappoint and that a known secret would cease to be a secret. Aglie also had a personal stake: if Belbo revealed it to everyone, Aglie would lose the mystery that sustained his charisma and his claimed identity as the immortal Saint-Germain. He therefore tried to persuade Belbo to confide in him alone, preserving the secret—and his own aura—through postponement. When that failed, he provoked Belbo, anticipating that stubbornness and a sense of the ridiculous could overcome even fear of death. The invented Plan’s ultimate force lies in this closed circuit: it turns fragments into apparent proof, belief into action, and the refusal to produce a final answer into further evidence that the hidden design is real.