Ask someone to picture ordinary historical clothing and they will probably picture cotton: a plain woven shirt, a simple tunic, something unbleached and slightly rough. That picture is anachronistic by a wide margin. In many parts of the world, cotton became the everyday fabric only after long-distance trade, colonial plantations and mechanised spinning made it cheap. Before that, what people wore was dictated almost entirely by what grew nearby or what their animals produced. The "cloth of the common person" was, in China, literally buyi — cloth clothing — and the word's history belongs to bast fibres, not to cotton.
To understand why the map of fibres looks the way it does, ignore the plant names for a moment and ask a more mechanical question: how long is a single fibre, and how much work does it take to turn it into a thread?
Fibre length decides everything
Spinning is the act of holding short fibres together by twisting them. Every fibre has a length, and that length sets a lower bound on how thin, how strong, and how smooth a yarn can be made. Cotton fibres are short staples, typically only a couple of centimetres long. Wool staples are longer and crimped, which lets them trap air. Silk is different in kind: a single cocoon yields one continuous filament that can be hundreds of metres long, so it needs no twist to become a thread at all. Flax, ramie, hemp and kudzu are bast fibres — long bundles pulled from the stem of a plant, but glued together by pectin and lignin, which means they must be separated chemically and mechanically before they can be spun.
This is why fibre choice is not really a matter of preference. A region with no animal that produces usable wool, no mulberry and no sericulture, and no spinnable cotton, will make cloth from stems — because stems are everywhere. The oldest textiles in many archaeological contexts are bast-fibre fabrics, and that is not because people liked them best. It is because the raw material grows as a weed.
Retting, stripping and splitting
Bast fibre is the structural tissue of a plant, and plants use it to stand up. It is stiff, and it is cemented into the stem. Getting it out is a process of controlled decay: stems are soaked or dew-retted so microbes break down the pectin holding the bundles to the woody core, then the fibre is beaten, scraped, washed, and split into finer strands. In China, kudzu (ge) and ramie (zhu) were both processed this way; hemp was handled similarly. The work is wet, smelly, seasonal, and skilled — the difference between a supple fibre and a brittle one is largely a matter of knowing when to stop the retting.
The resulting cloth has a distinctive personality. Bast fibres are strong, low in elasticity, highly absorbent, and conduct heat away from the skin. They crease sharply and they do not drape like wool. That combination is exactly why they dominated warm, humid regions: a loose ramie or kudzu robe is cool, washes easily, and holds its shape. It is also why these fabrics feel stiff to a modern hand trained by cotton knits.
There is an economic point here too. Because the fibre comes in long bundles, a great deal of processing happens before spinning rather than after. The labour is front-loaded and domestic. A household that grew and processed its own fibre was not buying cloth so much as spending weeks of work to avoid buying it.
Silk is the exception to every rule
Silk breaks the pattern completely. Sericulture — mulberry leaves, silkworms, cocoons, reeling — produces a continuous protein filament that can be reeled directly onto a bobbin. There is no carding, no retting, no twist required to hold short fibres together. That is why silk can be made into cloth so fine and so light that it behaves unlike anything else in the wardrobe, and why it was valuable for reasons that had nothing to do with luxury: it was the only fibre with that length.
It is also a system, not a crop. Mulberry trees, worm eggs, temperature, timing of the reel, and a supply of skilled hands all have to line up within a short seasonal window. That is why silk production stayed concentrated in regions that could sustain the whole chain, and why its spread was a transfer of knowledge and organisation rather than a bag of seeds. Chinese silk technology was for centuries the most consequential textile knowledge in Eurasia, and the trade in the finished cloth carried the technology's reputation with it.
Wool, felt and the shortcut around spinning
In pastoral regions the dominant fibre was wool, and wool has a property no plant fibre shares: scales on the fibre surface let it interlock under heat, moisture and pressure. Felting makes cloth without spinning and without weaving. You can produce a dense, wind-resistant, insulating sheet from loose wool and agitation alone — an enormous advantage where portable shelter and warm bedding matter more than a fine weave.
Felt and woven wool solve different problems. Felt is stiff, thick, and excellent at blocking wind; woven wool can be lighter, more flexible, and shaped by fulling and tailoring. Between them, highland and steppe populations had a wardrobe adapted to cold and movement long before cotton reached them. The contrast with bast-fibre regions is almost a map of climate: humid warmth suits a stiff, cool, washable plant cloth; dry cold suits a crimped, air-trapping animal fibre.
So why did cotton win?
Not because it is the best fibre. Cotton is comfortable, absorbent, and takes dye well, but it is neither as strong as ramie, as warm as wool, nor as fine as silk. It won on processing and scale. Once the cotton gin and mechanised spinning arrived, short-staple cotton — previously labour-intensive to clean — could be turned into yarn at a speed no bast fibre could match, because retting and stripping resist mechanisation in a way that ginning does not. Cotton also grows as an annual crop over huge areas, and it became the raw material of a global trade system with the shipping, capital and colonial land to move it cheaply.
In China, the shift has a recognisable human face: the Yuan-dynasty figure Huang Daopo is credited with bringing improved cotton spinning and weaving techniques from Hainan to the Songjiang region near present-day Shanghai, after which the lower Yangtze became a major cotton textile centre. Whether every detail of the traditional account is secure matters less than what the story records — a technology transfer that turned a regional fibre into the everyday cloth of a dense population. Within a few centuries, "cloth clothing" had quietly changed material without changing its name.
How to tell what you are looking at
You can often identify a fibre family without a label. Bast-fibre cloth has a dry, cool hand, a sharp crease, visible slubs and slight irregularities in yarn thickness, and a characteristic stiffness at folds. Wool has loft, resilience and a fuzzy surface. Silk has a continuous sheen that changes with the angle rather than a sparkle from individual fibres. Cotton sits somewhere in the middle: softer, more uniform, and more willing to drape than bast cloth.
Look at the selvedge and at a worn fold. Long bast bundles tend to break with a clean, fibrous snap; short cotton staples fuzz. The difference is a direct readout of the length of the original fibre — the same property that decided, centuries ago, what people in that place were able to wear.
Cotton feels like the natural default only because it won the last two centuries. For the long run before that, the wardrobe was a catalogue of local botany and local animals, and the shape of a garment began with a question about stems: how long are the fibres, and who is going to pull them apart?