About
What it is
A free knowledge base with the practical know-how needed to rebuild civilization from scratch: getting drinking water, producing food, healing, building, generating energy, obtaining metals or making tools.
Every article aims to be reproducible: quantities with units, steps with an observable success criterion, how to verify the result, common mistakes, safety, and variants with more or fewer resources.
How to use it
Search from any page (press /) or browse the domains, ordered by survival priority. Filter by domain, technology level or status on the search page.
Everything can be copied, downloaded and printed: each article has buttons to copy its text or link, download its Markdown or print it; each section has a print view and downloads, and Downloads has the complete guide as PDF, EPUB and for offline use.
Technology levels
Each article states the minimum technology level at which its main procedure is feasible. Variants for other levels are described inside the article.
| Level | Name | Available means |
|---|---|---|
| N0 | Natural materials | Hands, fire, stone, wood, bone, fibres and unprocessed natural materials. |
| N1 | Pottery and farming | Pottery, rope, polished stone and wooden tools, basic farming, weaving. |
| N2 | Craft metallurgy | Copper, bronze and wrought iron; craft workshop; animal traction; glass. |
| N3 | Early industry | Steel, steam, machine tools, basic chemistry, basic electricity, printing press. |
| N4 | Modern technology | Electronics, fine chemistry, combustion engines, synthetic materials, precision. |
Article status
- Draft
- Newly written or with pending corrections. It has not passed technical review: double-check figures and procedures.
- Reviewed
- It has passed a technical review of accuracy, reproducibility and safety, and cites its sources.
- Verified
- A person has confirmed it through direct experience or against primary sources.
Disclaimer
This information is provided as is, without warranty of any kind. It may contain errors or omissions, and applying it wrongly can cause injury, illness or damage.
Drafts have not passed technical review, and figures marked “verificar” are estimates awaiting confirmation. In health, chemistry, electricity, structures or any risky situation, check other sources and, where possible, an expert.
The people who write and publish this guide accept no liability for its use.
Licence: public domain
All content is published under the CC0 1.0 Universal dedication: you may copy, modify, translate, print, sell and distribute it, even commercially, without asking permission or citing the source (though citing it helps others find it).
The bibliographic sources cited by the articles keep their own rights: the guide summarises and explains, it does not copy.
Languages and translations
Everything is written and reviewed in Spanish. Translations are derived from the original and redone when it changes; before publication they are automatically checked to have the same structure and exactly the same figures.
- Español: idioma original de todos los artículos.
- English: 1 de 5 artículos traducidos (20 %).
How to contribute
Articles are Markdown files following a common template. You can suggest corrections, confirm figures from your own experience, write pending topics or review translations.