Under Heaven

Under Heaven is the default Game in the Brain setting — a detailed science fiction universe exploring humanity's path from an Earth-bound civilization to an interstellar one.

Section Overview

Under Heaven Content Structure
Subsection	Pages	Description
1. Setting Overview	5	Historical context, timeline (2000-3000), tech levels, and glossary
2. World Generation	10+	Procedural star system and planet creation
3. Technology & Progression	2	Technology levels and advancement
4. Characters & Creation	2	Character generation systems
Total	18+	Complete setting documentation

1. Setting Overview

Description: Background material explaining the historical development of the Under Heaven universe from 2000 to 3000 AD, including detailed timeline and technology progression.

Statistics: 5 pages | Setting foundation, timeline, technology levels, and glossary

Subsection Index

Page	Description
Background of Under Heaven	Historical overview of humanity's expansion
Under Heaven Timeline	Complete timeline from 2000-3000 AD (8 major eras)
Under Heaven Technology Levels	17 TL reference table with detailed descriptions
Technology_Levels_and_Timeline	Original technology progression chart
Under Heaven Glossary	Terms, factions, genotypes, and concepts

Key Setting Elements

Timeline (2000-3000 AD): Eight major eras of human development:; 2000-2050: Information Age & AI Race; 2050-2100: Space Industrialization; 2100-2200: Interplanetary Settlement & Mega Structures; 2200-2300: Interplanetary Industrialization; 2300-2400: Post Earth Dependence; 2400-2500: Outer Systems & First Contact; 2500-2600: Interstellar Trade Era; 3000: Full Interstellar Civilization (45 billion humans)

Technology Levels: Dual system tracking human progress from Neolithic (TL 0) to Self-sufficient Megastructures (TL 11); Detailed descriptions of each era's capabilities and limitations

Major Factions & Concepts: Commune States, Maker Movement, Homesteaders, Belters, Jovians, Herans; Angel Genotype, Uplifts, Heavy Worlders; Sovereign AI vs Rogue AI conflicts

2. World Generation

Description: Procedural generation systems for creating star systems, planets, and habitats consistent with the Under Heaven setting. See also the Mneme World Generator PWA tool.

Statistics: 10+ pages | Complete world generation system

Subsection Index

Page	Description
Mneme World Generator	Master index for world generation
Front Matter	Introduction and methodology
Definitions	Key terms and concepts
Determine Star	Stellar classification and generation
Determine Planetary System	Planet placement and orbits
Determine Main World	Primary planet characteristics
Determine Habitability	Life support analysis
Determine Inhabitants	Population and civilization
Ships & Star Systems	Master equation sheet
Appendix	Reference tables

3. Technology & Progression

Description: Detailed technology trees and progression paths showing how humanity advanced from Earth-bound to interstellar civilization.

Statistics: 2 pages | Technology documentation

Subsection Index

Page	Description
Technology_Levels_and_Timeline	Complete technology progression chart
Computing_Layers_260206	Computational infrastructure layers

4. Characters & Creation

Description: Character creation systems specific to the Under Heaven setting.

Statistics: 2 pages | Character generation

Subsection Index

Page	Description
Mneme Character Creation	Mneme variant character generation
Mneme Fantasy Character Creation	Fantasy adaptation

Related Systems

Ship & Vehicle Design: Mneme Ship and Vehicle Design — Construction rules for spacecraft and vehicles

Mneme World Generator PWA: GitHub Repository — Interactive web application

Content Summary

Under Heaven Section Totals
Category	Pages	Lines	Primary Focus
Setting Background	5	38,000+	History, Timeline (2000-3000), Tech Levels (TL 0-11), Glossary
World Generation	10+	—	Procedural systems
Technology	2	—	Tech progression
Characters	2	—	Character creation
Total	18+	38,000+	Complete setting

Detailed Content: Timeline: 8 major eras from Information Age (2000) to Interstellar Civilization (3000); Technology Levels: 17 technology levels from Neolithic to Self-sufficient Megastructures; Glossary: Terms, factions, genotypes, and concepts for the setting; Background of Under Heaven: Setting history and major events; World Generation: Complete star system and planet creation system