Safety, law and terms
This site describes furnaces that reach 1,100 °C, a chemical that boils when it meets water, a fishing method that is illegal in much of the world, and treatments for illness written for the case where no doctor exists. What follows is not boilerplate. It is the specific set of ways this material can hurt you, expose you, or quietly fail — and what is being done about each.
Updated 2026-09-27
Safety
No qualified practitioner has reviewed any procedure on this site — no doctor, pharmacist, engineer, electrician or chemist. Every step, guide and build says so at the top of the page. Where a qualified expert can be reached, ask them before acting on anything here; the procedures are written for when none can.
Nothing here is a substitute for a qualified engineer, and no drawing on this site should be treated as certified. The drawings are compiled from historical practice and published sources, dimensioned to be internally consistent and buildable — that is not the same as reviewed for your ground, your materials, your climate or your crew.
Every build carries its own failure modes, and those sections are the most carefully written part of each page. They are not a formality. Read them before you start, not after something goes wrong.
Weapons and fighting are out of scope. This site does not teach the making or use of weapons, or fighting technique. Defence is covered as organisation — the watch, the alarm, the perimeter, the refuge, and the rule agreed in advance for when force may be used — on keep watch and defend the settlement.
Slaking is violently exothermic. Quicklime and water reach boiling and spit caustic slurry. It burns skin on contact and blinds on contact with eyes, and the reaction accelerates as it goes. The rule in the lime kiln build — lime into water, never water into lime — is the whole of the difference between a controlled reaction and an explosion in a bucket. Eye protection and covered skin are not optional.
Charcoal clamps, kilns, forges and any combustion in a confined or partly enclosed space produce it. It is the single most likely way to die quietly while doing something on this site correctly in every other respect. Never burn charcoal indoors, in a tent, in a pit you are standing in, or in any shelter you intend to sleep in.
The bloomery, the forge and the kilns all reach temperatures where a splash is a permanent injury and a wet tool causes a steam explosion. Assume anything near a working furnace is hot enough to ignite clothing.
The raised granary carries load overhead. The root cellar is a hole in the ground you work inside. Unshored excavation is one of the most consistently fatal activities in construction, and soil that has stood for a week can fail in a second.
The slow sand filter substantially reduces pathogens and turbidity. It does not sterilise, it does not remove dissolved chemical contamination, and a disturbed or newly started bed performs far worse than a mature one. Where you can boil, boil. The water steps say the same thing and they mean it literally.
Anaerobic storage of low-acid food is how botulism is produced. Root cellars, sealed grain and any airtight preservation carry this risk, and the toxin is odourless and tasteless. Follow the storage conditions as written rather than improving on them.
This site does not contain a field identification guide and must not be used as one.
Health and medicine
The health material on this site is written for a specific situation: no doctor, no hospital, no reliable supply of drugs, and no prospect of any of those arriving. That is the only situation in which it is the best available option.
If professional medical care is available to you, it is better than anything written here, in every case, without exception. Use it. Reading a procedure is not training, and the gap between the two is where people die.
Nothing on this site is a diagnosis, a prescription, or a treatment plan. It does not create any clinical relationship, and it has not been reviewed by a medical professional.
Law in your jurisdiction
This site describes what is physically possible and historically done. It says nothing about what you are permitted to do, and the two differ substantially almost everywhere.
Checking is your responsibility, and in most of these cases the check is quick.
Illegal for recreational use across much of Europe, North America and Australia, and licensed or seasonally restricted in most of the rest. Both are on this site because they are historically and technically important. Neither is a suggestion to go and set one.
Dwellings, permanent structures, wells, cellars and anything carrying load are subject to building control, planning permission and inspection in most jurisdictions.
Charcoal clamps, lime kilns and pottery kilns produce smoke and often require a permit, a setback distance, or are banned outright during dry seasons.
Abstraction from a river, spring, well or borehole is a licensed right in many countries, not a property right. Discharge of waste water is regulated separately and more strictly.
Digging, felling and clearing may be restricted by tenure, protected species legislation, or heritage designation — including on land you own.
No warranty
This site is provided without warranty of any kind, express or implied, including fitness for any particular purpose. The authors and publisher accept no liability for any loss, injury or damage arising from its use, to the extent permitted by law.
That paragraph exists on every site, so here is the part that is specific and true: this material is written to be used when verification is no longer possible, which is exactly when an error in it is most expensive. The method page documents the two citation failure modes already found and corrected here, and the roadmap lists what is known to be missing. Neither list is finished.
Licensing and reuse
Historical plates. Of the 17 plates bundled with this site, 7 are public domain and 2 are CC0. The remaining 8 are Creative Commons Attribution-ShareAlike — five under CC BY-SA 3.0 and three under CC BY-SA 4.0. Every plate displays its author, its licence with a link to the deed, and a link to its source page on Wikimedia Commons, and that attribution travels with the offline single-file edition. Images were resized to a display width of 900 px; no other modification was made.
If you redistribute those plates, the ShareAlike terms come with them. If you strip the captions, you break the licence.
Cited books. Every work in the library is linked, not hosted. Project Gutenberg texts carry their own terms; the bulk archives carry theirs. Check before redistributing any of them.
This site's own text and drawings are CC BY-SA 4.0. Copy it, print it, mirror it, translate it, build on it, commercially or not — credit Civilization101 Blueprint, link the licence, say if you changed anything, and license what you build under the same terms. The share-alike is the point: a document whose premise is that you take it offline and keep it is worth very little if the copy you took cannot legally be passed on.
Privacy
There is no account system, no login, no comment form and no analytics written into this site. Your progress through the ladder and your light or dark preference are stored in your browser's local storage, on your device only. Clearing site data erases them, and nobody else can read them — not us, because there is no server of ours for them to reach.
The service worker stores the site's pages and data on your device so it works offline, and each photograph once you have viewed it; the Take it offline page can save all of them at once. Because photographs are kept as you view them, that cache shows which pages you have opened. It never leaves your device, and clearing site data removes it.
One thing does not come from us and should be stated plainly. Serving any page discloses your IP address and request to the host, Cloudflare. The host may also add its own analytics and bot-detection scripts to the pages it serves; this site's security policy blocks every script the site did not ship itself, so none of them runs. The typefaces are served from this site, not from Google, since 2026-09-27. The single-file offline edition makes zero external requests of any kind — if that matters to you, use it.
Security and integrity
The site runs no third-party code of its own, has no server component, accepts no user input that reaches anyone else, and stores nothing about you. The realistic risks are therefore about the content being wrong, and about the copy you hold being the one that was published.
Reporting. Errors — especially in the safety, water, health and dimensional material — and security problems both go to support@pipchat.in. A dimension that is wrong on this site is a safety defect, not a typo, and is treated as one.
Integrity of an offline copy. A downloaded single-file edition can be modified afterwards, and nothing inside it can tell you whether it was — a checksum written into a file changes the bytes it is the checksum of. Each release is therefore hashed at build time and the value is published on Take it offline, alongside the command to check it on Linux, macOS or Windows. Verify a copy before you trust it, and again before you rely on it years later: media that has silently rotted fails the same test.
What this site guarantees, and what it does not
Offline. After one visit, the service worker holds the entire corpus — every page, every drawing, every plate — and the site works with the network gone. That covers a lost connection. It does not cover a lost device, a cleared browser, or this domain ceasing to exist.
The durable copy is the file. npm run bundle produces a single self-contained HTML file with everything inlined and zero external requests, which opens by double-click from any storage in any browser. That, printed pages, and the offline library described on Take it offline are the copies that survive. A website you can reach today is not an archive — treating it as one is precisely the information-decay failure this site is about.
Requirements. A browser with ES module support, which means anything from roughly 2018 onward. There is no build step, no framework and no bundler: the source is plain HTML, CSS and JavaScript, and can be read, corrected and re-hosted by anyone with a text editor. That is deliberate, and it is a durability decision rather than a stylistic one.
Known limits. Local storage can be cleared by the browser without warning, so progress marks are convenience, not record. Cached content updates on the visit after a change is published. The library links point outward and can rot; the method page explains how they were verified and how often that fails.