Major Systems of the Span — Selection Framework
Major Systems of the Span — Selection Framework
Purpose
The Span contains roughly 150 settled systems, of which 30 are Major Systems. The Reach/Riftmoor accounts for one; the generated dataset supplies the other 29. The remaining ~120 are Minor Systems.
Major status does not simply mean “largest viable surface area.” Major Systems are the Span's principal population, political, military, industrial, cultural, and historical centers. Pasted text
Target League Structure
| Alliance | Empire | Total | |
|---|---|---|---|
| Major Systems | 17 | 12 | 29 |
| Development style | Wide | Tall | — |
| Viable surface area | ~50% | ~50% | 100% |
The 17:12 asymmetry is intentional. The Alliance occupies more Major Systems and more individual viable worlds, while the Empire concentrates comparable habitable surface area into fewer, larger centers. Surface area—not world count—is the primary balancing currency. Pasted text
Alliance
Domains: Naja · Morvaren · Bloodhorn
Development philosophy: Wide
Alliance space should visibly favor more systems, more viable worlds, more viable moons, unusual settlement arrangements, and reduced dependence on individual planets. Gas giants surrounded by viable moons are particularly attractive because a single planetary system can support an entire distributed civilization. Pasted text
A characteristic Alliance system might contain:
2 viable planets + 5 viable moons
rather than one enormous super-planet.
Across the final selection, the Alliance should possess substantially more viable worlds than the Empire while controlling approximately the same total viable surface area.
Naja — Life
Preferred environments: Tropical · Temperate · Taiga
Naja seeks living worlds capable of supporting extraordinary biological abundance: immense forests, giant trees, rich ecosystems, and tremendous biological productivity.
Planetary size is secondary to biospheric potential. Several medium or small lush worlds may therefore be more characteristically Naja than a single enormous temperate planet. Pasted text
Morvaren — Decay
Preferred environments: Fungal · Mountain, with Tundra, irradiated or otherwise hostile worlds, unusual moons, and marginal environments also fitting well.
Morvaren worlds should often feel ancient, hostile, strange, or ecologically abnormal. Aquatic Morvaren subfactions also mean that Ocean worlds are not automatically Haventide territory. Pasted text
Bloodhorn — Fire
Preferred environments: Volcanic · Arid · Desert · Savanna
Bloodhorn favors hot and physically harsh worlds. These environments are not merely aesthetic preferences: conditions hostile to outsiders provide a defensive advantage to inhabitants adapted to them.
Bloodhorn can inhabit more conventional environments and possesses aquatic populations, so Ocean is likewise not exclusive to Haventide. Collections of hot planets and volcanic moons are particularly characteristic Bloodhorn systems. Pasted text
Empire
Domains: Lekaris · Haventide · Fairbarrow · Azure Guard
Development philosophy: Tall
Imperial space should favor fewer systems, fewer viable worlds, larger worlds, fewer but larger and better viable planets relative to moons, and concentration of viable surface into major planetary centers. Pasted text
A characteristic Imperial system might contain:
3 enormous viable planets + 0 viable moons
Three billion km² distributed across three major planets is preferable to the same surface scattered among nine smaller planets and moons.
This is a statistical tendency, not a prohibition against moons.
Lekaris — Electric
Preferred environments: primarily Temperate, followed broadly by pleasant Tropical, Savanna, Ocean, and similar environments.
Lekaris is the Empire's great mixing-pot Domain. Its true environmental signature is storms and energetic atmospheres, which the biome system does not directly represent.
Lekaris generally regards extreme Fungal, Volcanic, Desert, Arid, Tundra, Taiga, and Arctic environments as better suited to the other, less refined Domains. Consequently, large, comfortable and heavily populated planets—particularly Temperate worlds with violent weather—make excellent Lekaris centers. Pasted text
Haventide — Water
Preferred environment: Ocean
Haventide seeks enormous water-rich worlds capable of supporting its substantial aquatic populations. One or several immense Ocean planets make an ideal Haventide Major System.
Haventide differs somewhat from the normal Imperial preference for consolidation, however. It is comfortable with networks of smaller watery moons functioning as “harbors.” Pasted text
Fairbarrow — Ground
Preferred environments: Arid · Mountain · Savanna, with other ground-rich environments possible.
Fairbarrow's most important resource is the planet itself.
It seeks large, massive, sturdy rocky worlds capable of supporting enormous pit cities, subterranean construction, and groundwater-recycling vertical agriculture. Fungal, Arctic, Volcanic, and Ocean-dominated worlds are comparatively poor fits because Fairbarrow needs tremendous quantities of usable rocky ground and soil. Pasted text
For Fairbarrow, prioritize:
Radius + Gravity + Rocky Status + Planetary Surface Area
A 10–12k km radius, ~1.3–1.5g rocky planet can be quintessentially Fairbarrow even when its primary biome is not Mountain.
Azure Guard — Ice
Preferred environments: Arctic · Tundra · Taiga · cold Mountain
Azure seeks cold worlds because the cold itself provides protection and resources. It kills poorly adapted enemies while encasing and preserving resources others are unwilling or unable to exploit.
Azure populations are miners and fortress builders accustomed to environments most civilizations consider miserable. Their ideal Major System may therefore be extraordinarily concentrated: potentially even one gigantic frozen fortress-world. Pasted text
Terraforming and Biome Interpretation
The generator does not determine which Domain owns a system.
Its biome output represents the finished geography of a system after Warden civilization.
Wardens possessed extraordinary terraforming capabilities, but still worked from the physical possibilities offered by each system:
Natural System Potential → Warden Terraforming Possibilities → Domain Preferences → Finished Biome Distribution
Thus a naturally favorable collection of hot inner worlds might have been developed by Bloodhorn Wardens into Volcanic, Arid, and Desert environments. Large cold outer rocky planets could become Azure strongholds. Giant planets with terraformable moons might encourage distributed Naja or Morvaren civilizations. A massive rocky planet suitable for Fairbarrow could be shaped around Fairbarrow civilization without requiring Mountain to become its dominant biome. Pasted text
Biome composition is therefore evidence of which Wardens shaped a system, not a deterministic ownership roll.
Mixed biome signatures can also indicate that multiple Domains participated in developing a Major System, which is desirable and expected. Pasted text
Major-System Selection Priority
When evaluating the updated dataset, systems will be judged in this order:
- Architecture — planets, giants, belts, moons, zones, and location of viable worlds.
- Total viable surface area — overall capacity to support Major-System status.
- Distribution of viable area — whether capacity resides in one huge planet or many smaller worlds.
- Planet vs. moon viability — one of the strongest Alliance/Empire indicators.
- Individual viable-world size and gravity — especially significant for Empire and Fairbarrow.
- Biome composition and individual-world biomes — evidence for likely Domain settlement and terraforming.
- League-wide balance — the completed selection must express the intended wide/tall distinction. Pasted text
Major Threshold
1,500 million km² of viable surface area remains the strong baseline for Major-System candidacy, but is not a hard cutoff.
An unusual 1.2-billion-km² system containing five important viable moons may be a much better Major System than an unremarkable 1.6-billion-km² single-world system. Pasted text
Final Numerical Targets
We will not predetermine exact viable planet/moon totals before seeing the rolls.
Instead, the final 29 must exhibit these relationships:
Alliance — 17 systems
- More viable worlds
- Substantially more viable moons
- Smaller average viable world
- Lower viable surface area per system
- Greater physical/geographic distribution
Empire — 12 systems
- Fewer viable worlds
- Substantially larger average viable world
- Greater proportion of viable surface located on planets
- Much greater viable surface area per system
- Greater physical/geographic concentration
League surface-area balance: target 49–51% each. Approximately 48–52% is acceptable when it produces substantially better system architecture, Domain identity, or narrative logic. Exact mathematical parity should not override a clearly superior assignment. Pasted text
The Alliance should look larger when you count the map. The Empire should look just as large when you count habitable land.
That is the defining physical distinction the 29 Major Systems of the Span should preserve. Pasted text
Locked in. I'll use this edited version—not the earlier rubric—when you send the updated system dataset.
