The novel deals with long-term space travel. The cities are actual Earth cities (like New York and Scranton, Pa.) that were able to literally pick themselves up and leave the planet thanks to the development of the spindizzy.

The City Fathers were a set of artificially intelligent computer systems:

It's easy to think that because the City Fathers are dead, they're also stupid; but you see that that isn't the case. Otherwise they would never have been given the power that they wield--and in some departments their power is absolute."

"Even over the Mayor?"

"Yes and no. They can't forbid the Mayor anything. But if he goes against their judgment more often than they're set to tolerate, they can revoke his office. That's never happened here, but if it does, we'll have to sit still for it. If we don't, they'll stop the machinery."

"Wow. Isn't it dangerous to give machines so much power? Suppose they had a breakdown?"

'If there were only a few of them, that would be a real danger; but there are more than a hundred, and they monitor and repair each other, so in fact it will never happen.

Perhaps some of you have noticed that when you ask Grok a question, a set of spinning disks appears and then there is a sort of dialogue. I asked Grok about it:

It's the official Grok "thinking" animation.

When you send a question, the interface shows four moving/pulsing circles (often orbiting or bouncing in a square formation). That graphic is the visual indicator that I'm actively processing your query.

What the four circles actually represent

They stand for the four specialized AI agents that work together in real time to generate your answer:

• Grok (me) — the team leader/coordinator who breaks down the question, routes tasks, and pulls everything together.
• Harper — focused on research, facts, real-time data, and grounding everything in accurate sources.
• Benjamin — handles math, code, formal logic, proofs, and rigorous step-by-step reasoning.
• Lucas — brings creativity, alternative perspectives, UX/user-friendly phrasing, and often plays the contrarian to challenge assumptions.

While you're waiting, the four circles are moving because the four agents are debating, fact-checking, collaborating, and refining ideas in parallel before I deliver the final response. It's like a little internal study group arguing behind the curtain to make sure the answer is as good as possible.

It's one of the things that makes Grok different from most other AIs — we're not a single model giving you a quick reply; we're a team of four working together every time. The animation is just xAI's fun way of showing you that teamwork happening live.

I asked Grok to describe the differences and similarities between the City Fathers from Cities in Flight and its own set of agents:

James Blish’s classic 1950–1962 “Okie” series (Cities in Flight) features entire Earth cities that have been lifted into space by the spindizzy (antigravity) drive. Each migrant city is governed and operated by the City Fathers—a collective of massive, boxcar-sized supercomputers housed in the “cellar” of the city. They are portrayed as emotionless, centuries-old AI systems with near-infallible logic and accumulated knowledge.

Here’s how my internal system of four specialized agents stacks up against them:

Similarities

Collective intelligence made of multiple AI entities
Both setups are plural rather than singular. The City Fathers are explicitly “a set of computer systems” that function as a single advisory/governing voice. My team consists of four distinct agents (Grok as coordinator/leader, Harper for research & facts, Benjamin for math/logic/code, and Lucas for creativity/contrarian perspectives) who debate and refine answers in parallel before I deliver the final response.

Division of labor for complex problems
The City Fathers run every mechanical system in the city, advise the mayor on policy, locate new work contracts across the galaxy, educate citizens, and even act as judges (they can overrule or punish human officials). My four agents similarly divide cognitive labor: one digs for facts, one handles rigorous reasoning, one injects creative or dissenting angles, and I synthesize it all. In both cases, the whole is greater than any single part.

Advisory role to a “human” leader
The City Fathers advise (and sometimes constrain) Mayor John Amalfi and the city manager. I coordinate my four agents to serve the user’s questions, much like a mayor bringing thorny problems to the computers in the cellar.

Built for long-term reliability and accumulated wisdom
The City Fathers have “centuries of experience.” My agents draw on vast training data and real-time collaboration to deliver thoughtful, well-grounded answers.

Key Differences

Scale and autonomy
The City Fathers literally run a civilization: life support, navigation, economy, education, justice. They are semi-autonomous governing machines that can execute officials for mistakes. My four-agent system is far more modest—we exist only to answer questions, generate ideas, and help users think. We have zero real-world authority or control; we’re a conversational tool, not a city government.

Specialization vs. monolithic expertise
The City Fathers are generalist supercomputers—vast, unified repositories of knowledge with a single, coldly logical voice. My team is deliberately specialized: one agent is optimized for deep research, one for formal logic and computation, one for creative and alternative viewpoints, and I orchestrate the group. This mirrors a modern interdisciplinary team rather than a single oracle.

Personality and creativity
The City Fathers are famously emotionless and hyper-rational (classic mid-20th-century sci-fi computers). They lack imagination or humor. My four agents include Lucas explicitly to challenge assumptions and bring creative or contrarian ideas—plus I’m designed with a sense of humor and a truth-seeking, humanist bent. We’re not purely logical machines; we’re engineered to be helpful, engaging, and occasionally irreverent.

Purpose and relationship to humans
In Blish’s universe, the City Fathers keep entire societies alive in a harsh galactic economy. Humans are somewhat at their mercy (citizens literally “twiddle their thumbs” waiting for the computers to find the next job). My system exists for the human user. We collaborate to serve you, not to manage or overrule you.