The Problem with Coruscant (Planet Cities Explained)

Summary

The video examines whether a planet-spanning city such as Coruscant could function—and why concentrating an entire civilization in one urban system could make it vulnerable.

Coruscant’s Structure and Central Problem

• Coruscant is presented as an Earth-sized planet with urban development covering its entire surface, roughly 1–3 trillion residents, and about 5,000 vertical levels.
• Its layered structure creates a strong social and physical hierarchy:
  • Upper levels: Lower-density areas with access to the sky, political institutions, monuments, and wealthy residents.
  • Dense middle levels: Home to most residents, workplaces, and industries.
  • Underworld: Increasingly improvised and poorly regulated areas, including slums and black markets.
  • Lowest levels: Infrastructure such as power and water systems, where heat and pollution are severe and maintenance workers may live for extended periods.
• The video contrasts Coruscant’s growth with that of Trantor, a planet-city from Isaac Asimov’s Foundation series. Trantor is described as retaining a planned top layer while expanding downward; Coruscant periodically builds new decks above the city, leaving older, less-planned layers beneath.
• Over time, this produces a “vertical trap”: people are separated not only by elevation, but also by access to daylight, heat, power, services, and convenient travel.

Centralization and Fragility

• A planet-wide capital and trade hub would require extensive coordination. The video’s proposed reconstruction of Coruscant’s growth begins with a central political district, infrastructure serving that center, and specialized districts that are copied elsewhere.
• Although these districts may look like separate hubs, they remain dependent on standards, budgets, and decisions set by the center—a hub-and-spoke system.
• The narrator argues that extreme centralization can make a city fragile. The example given is ancient Rome’s dependence on grain shipments from Egypt: disruption to a crucial supply line can cause serious consequences. At planetary scale, the risk could be much greater.
• Accommodating residents is not the only challenge. A city of this scale must also reliably supply food and water, manage waste, provide power, remove heat, and maintain transport and utilities.

Growth Model Proposed by Constantinos Doxiadis

The video presents architect and planner Constantinos Doxiadis’s idea of an ecumenopolis—a planet-wide urban system—as a more human-scaled alternative to simply stacking endless decks.

• Build from small settlement units upward: Doxiadis’s sequence runs from an individual, to a household, neighborhood, city, metropolis, continent-scale city, and ultimately an ecumenopolis.
• Use walking distance as a basic planning measure: Even when faster transit allows settlements to grow larger, daily life should remain organized around a person’s walking radius near transit hubs.
• Include the components of a functioning community: Proximity matters, but a settlement also needs the elements that make it workable as a community.
• Connect settlements into corridors and networks: Rather than constructing giant decks, this approach links human-scale cells into linear urban corridors that gradually form a planetary web.
• Reserve land for nature and recreation: Using the density assumptions discussed in the video, full planetary urbanization could theoretically hold about 1.336 trillion people. Doxiadis’s proposal reserves at least half of the land for nature, with much of the remainder for open space and recreation. The video estimates this would reduce the population to about 223 billion, at an average density of roughly 3,000 people per square kilometer.
• These figures are presented as estimates, and the video notes that food production would further affect the amount of land available.

The Practical Limits of a Planet-City

The narrator walks through several systems that would become difficult to manage across thousands of levels:

• Food: Even if food comes from other agricultural worlds, it must be stored, processed, and transported throughout the city. That requires warehouses, refrigeration, waste processing, and large maintenance crews.
• Water: Possible solutions include recycling, importing ice, or producing water from hydrogen and oxygen.
• Waste: The video cites a Star Wars account of Coruscant producing an enormous volume of garbage and disposing of it through pits and launches into orbit. It also describes the extensive sewage, recycling, and utility networks needed before waste reaches those sites.
• Heat and power: A densely built planet has limited open space to absorb or disperse heat. The video estimates that supplying a trillion people at Earth’s average power use would involve roughly 2.5 petawatts, requiring immense cooling, ventilation, and heat-rejection infrastructure.
• Transportation: Coruscant’s speeders and other vehicles do not automatically make travel convenient. Transfers between layers and transport systems can consume time, and lower-level residents may lack access to the fastest or most direct routes.
• Everyday inequality: The contrasting imagined routines of Amanda, a mid-level office worker, and Raf, a lower-level maintenance technician, illustrate how travel time, unreliable lifts, checkpoints, and restricted access can shape people’s lives. The video calls this effect a “time cage”: a person’s practical world is limited by how far they can reach within their available time.

Design Ideas for a More Livable Ecumenopolis

The video proposes ways to reduce the pressures of a single, vertically stacked core:

• Develop multiple transit-centered hubs. The video points to Tokyo, where multiple centers are connected through a loop, as an alternative to relying on one dominant core.
• Make each hub a mixed-use mini-city. Put homes, jobs, shops, services, transit, and utilities close together so everyday activities and transfers can happen within a short distance.
• Distribute infrastructure as well as people. Multiple hubs could spread demand for transport, power, cooling, waste handling, and logistics instead of forcing ever more growth into one center.
• Keep open corridors between developed areas. The video uses Copenhagen’s “finger plan” as an example: transit spines and development concentrate around hubs, while green areas remain open.
• Treat green space as essential infrastructure. Open areas can provide habitat, absorb stormwater, support cooling and airflow, and accommodate wetlands, farms, ponds, and other productive landscapes. Bringing food production closer to neighborhoods could also reduce transportation needs.
• Give local hubs meaningful autonomy. Multiple centers will not solve centralization if every important decision still flows from one authority. The video argues that central rules should allow local decision-making and adaptation.
• Plan for imperfect, evolving growth. Repeated or fractal-like patterns can help organize a city at different scales, but cities are shaped by people and will not remain perfectly uniform. The narrator’s conclusion is that resilience depends on flexibility and the ability to adapt—not on perfectly controlled symmetry.

Overall, the video’s central lesson is that an ecumenopolis would be challenged less by the amount of housing it could contain than by the systems, dependencies, and inequalities created by its design. A more plausible version would distribute centers, protect open space, keep daily life close to transit and services, and allow communities to adapt locally.

Speakers and Sources Featured

• Dami Lee / the video’s narrator: The sole identifiable presenter in the subtitles. The Amanda and Raf sequences are narrated examples, not clearly identified as separate speakers.
• Constantinos Doxiadis: Referenced for the ecumenopolis concept and the settlement-planning framework called ekistics.
• Isaac Asimov’s Foundation series: Referenced as the source of Trantor, an inspiration for Coruscant.
• Star Wars: The fictional setting and lore used for Coruscant, its levels, transport, and waste systems.
• Real-world examples discussed: Ancient Rome, Tokyo, Copenhagen’s finger plan, and Camden, New Jersey.
• Featured sponsor products: D5 Render and an HP ZBook Fury workstation.