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76 solutions documented and sourced.

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Food & Preservation Africa

Mursi and Suri Cattle Blood-Milk Nutrition

Mursi, Suri, Hamar, Dassanech and other lower-Omo valley pastoralist peoples of southwestern Ethiopia

A pastoralist nutritional practice — bleeding live cattle and mixing the blood with milk — that provides concentrated …

Pennsylvania Barn-Raising — Amish Mutual Aid
Finance & Community Americas

Pennsylvania Barn-Raising — Amish Mutual Aid

Old Order Amish and Mennonite Communities

A community raises a neighbor's barn in a single day using donated labor and pre-cut timbers — the …

Food & Preservation Africa

Indigo Dyeing and the Aniline-Resistance West African Dye Tradition

Yoruba (adire), Bamana/Bambara (bogolan-overlay), Tuareg (tagelmust), Hausa (kano-pit dyeing)

Fermented Indigofera tinctoria and Lonchocarpus cyanescens leaf dyeing — the blue-textile technology that connected West Africa to India …

Ifugao Rice Terraces of the Philippine Cordillera
Land & Agriculture Asia

Ifugao Rice Terraces of the Philippine Cordillera

Ifugao People (Philippines, 2,000+ years continuous)

Hand-carved wet-rice terraces of the Ifugao Cordillera — over 2,000 years of continuous family-line stewardship, UNESCO World Heritage …

Land & Agriculture Europe

Hügelkultur — Buried-Log Permaculture Raised Beds

Germanic and Slavic Central European agroforestry, codified by Sepp Holzer (Austrian permaculture)

Raised garden beds built over a base of rotting wood — a low-input, water-retaining, soil-building technique with documented …

Health & Remedies Global / Widespread

Willow Bark Preparation for Pain Relief

Ancient Sumerian, Egyptian, Greek, and Indigenous North American medical traditions

Willow bark, the source of salicin, has been chewed, brewed, and applied for pain and fever in many …

Manuka Honey for Wound Care and Infection
Health & Remedies Oceania

Manuka Honey for Wound Care and Infection

Māori Traditional Medicine, Aotearoa New Zealand

Active honey from the mānuka tree (Leptospermum scoparium) applied topically for wound healing, burns, and infection control.

Food & Preservation Global / Widespread

Lacto-Fermentation for Vegetable Preservation

Korean (kimchi), German (sauerkraut), Russian/Eastern European (rosolniki), Chinese (suan cai), Japanese (tsukemono) — independently developed across most agricultural societies

Salt-water and lactobacillus-driven anaerobic fermentation of vegetables — the dominant pre-refrigeration preservation method for fresh produce, with documented …

Building & Shelter Global / Widespread

Rammed Earth Wall Construction

Han Dynasty China, Roman North Africa, pre-Columbian Andes, French Rhone valley

Rammed earth walls are built by tamping moist soil between formwork in thin lifts. The technique is documented …

Building & Shelter Global / Widespread

Rocket Stove — High-Efficiency Wood Cooking

Modern adaptation by Aprovecho Research Center (Oregon), drawing on combustion principles documented in pre-industrial Asian and European cooking traditions

A high-efficiency wood-burning cookstove design — using insulated combustion chambers and chimney effect — that reduces fuel consumption …

Lewis Hyde's Gift Economies — Anthropology of Reciprocity
Finance & Community Global / Widespread

Lewis Hyde's Gift Economies — Anthropology of Reciprocity

Anthropological Synthesis (Lewis Hyde, drawing on Mauss and Malinowski)

Hyde's documented examples of long-running gift economies — Kula ring, Pacific Northwest potlatch, Iroquois harvest distribution — and …

Roman Hypocaust — Underfloor Radiant Heating
Building & Shelter Europe

Roman Hypocaust — Underfloor Radiant Heating

Roman (Sergius Orata, 1st century BCE)

Underfloor heating system invented by Sergius Orata around 80 BCE: a raised floor on short brick pillars, with …

76 total solutions across 7 pages