AN ENERGY ATLAS FOR ONE VERY YOUNG CIVILIZATION
Power is a rate. Energy accumulates. The Kardashev scale asks how much power a civilization can use—not how wise, fair, or advanced it is.
FIRST, MOVE THE CIVILIZATION
Every step right is 10× more power. That makes a century of change visible without pretending a planet and a galaxy are close.
Conventions vary. Kardashev's 1964 paper used different boundaries; this atlas labels the popular rounded version and keeps the assumptions visible.
A watt tells us how much—not where it came from.
NOW FOLLOW THE CHAIN
Yes—under a primary-source accounting. Wood stored sunlight through photosynthesis. But the answer changes if you classify the immediate fuel or the useful output.
Primary source: Sunlight. Burning wood harnesses chemical energy a plant recently stored. It is a renewable flow only when regrowth replaces the harvest.
FLOW · renewable when regrownThese flows are ancient. Deliberate, cumulative routing is recent.
KEEP “NOW” ON THE RIGHT
The same present, seven windows. As the window grows, industrial civilization collapses into the last sliver.
One century: primary power rose from roughly 2.1–2.3 TW in the 1920s to 20.3 TW in 2025. That is about one order of magnitude—and only ~0.10 on this logarithmic Kardashev interpolation.
Electrification, antibiotics, aviation, nuclear power, spaceflight, computing, and global communication arrived within this single window.
Capability can change much faster than civilization’s total power.
CHANGE TWO INDEPENDENT THINGS
This toy scenario separates workload growth from efficiency. A third, explicitly qualitative lens asks what AI helps people accomplish; it does not secretly move the Kardashev score.
not a forecast. Baseline is 415 TWh in 2024. Scenario = baseline × workload growth ÷ efficiency improvement. The leverage lens uses named states—not a measured unit—because discovery and coordination do not share a defensible unit with watts. *The K delta is scale-only arithmetic: it compares average electric load directly with primary power; formal accounting methods differ.
THE PERSPECTIVE
Life has converted solar and chemical gradients for billions of years.
Fire moved stored chemical energy outside the body.
Agriculture redirected photosynthesis toward human systems.
Industry tapped dense stocks and built converters at planetary scale.
AI may improve the converter's design and coordination—while becoming another load on it.
The Kardashev scale rewards throughput. It does not measure efficiency, distribution, ecological stability, computation, knowledge, or human welfare. A civilization can use more power badly. “Usable” is also political and ecological, not only physical.
The 2025 total of 177,865 TWh/year (about 20.3 TW average) sums the newest global source series available here. Primary energy methods differ, especially for non-combustible sources. The app labels the year and avoids pretending the third decimal is permanent truth.
Place, trace, zoom, simulate: four different operations answer four different questions. A waste-heat model was rejected because it introduced a second planetary-physics lesson too early. Per-prompt AI estimates were rejected because model, hardware, utilization, and boundary choices vary too much.