Materials

B02　—　Cross-cutting theme

What is money made of? Gold, silver, copper, paper — and then, numbers.

Supervised by: Mitsuru Hayama　／　Reading time (main text): course text ~8 min + textbook ~336 min = ~344 min　／　Beyond the text: 10 exercises · 6 coins · 11 readings

What this course teaches you to do

• You can name four conditions a monetary material must satisfy.
• You can explain what was lost and what was gained in moving from metal to paper.
• You can trace how "securities tied to land" turned into paper money.
• You can give examples where the supply of a material governed the system.
• Can explain the range of material weights (from several hundred grams to one gram) with concrete examples.
• Can interpret the debasement of coinage material during wartime as an indicator of national power.

TEXTBOOK

Lessons (8)

1. Four conditions a material must meetOf the four conditions, sufficiency is hardest. Too little fails; too much fails as well.
2. The luck of the ground was holding up the systemA system rides on the supply of its material. The gold standard lasted because gold kept being found.
3. Even with backing, paper diesEven with backing, paper dies if it cannot be redeemed fast enough.
4. The material vanished; only the number stayedThe material thinned from metal to paper to figures. As it thinned, the promise itself came into view.
5. Three Hundred Grams and One Gram — The Range of WeightsUnder the same name of "coinage," weights can differ three-hundredfold. The choice of weight reflects a society's answer.
6. War Seizes Materials — National Strength Felt at Your FingertipsSilver → Cupronickel → Aluminum → Tin and Zinc. The debasement of materials was a chronology of the war effort, which people felt at their fingertips.
7. The Electron as Material — The Day Texture VanishesMetal → Paper → Numbers on a screen. As the material vanishes, only trust remains. The present progressive of Section 4.
8. Chosen for function — The modern philosophy of materialsModern materials are chosen for function, not value. The three-layer 500-yen coin is the modern expression of four hundred years of craftsmanship.

Case studies — applied in the materials (11)

• Debt calls forth a revolution　France　1789–1790　A print shop, Paris
  §3. The scene where the assignat was born as a bond — not as paper money.
• The paper they printed too much of　France　1795–1803　The window of a money-changer, Paris
  §3. After paper died twice, the decision to return to metal.
• The bank of the world　Britain　1848–1886　From California to South Africa
  §2. The passage saying the premise of the gold standard rested on "the luck of the ground."
• Epilogue　Overview: 2,700 years of the world　the end of the journey　A Promise of 2,700 Years
  §4. What remains on a worn coin. What lies beyond the thinning of the material.
• The Roman Republic　Overview: 2,700 years of the world　300 BC　Early Rome
  Section 5. A 300-gram piece of bronze. Physical evidence from an era when the value of the material itself was the currency.
• From the lifting of the gold embargo to war　Japan　1938–1944　across Japan
  Section 6. "The hands knew first." A fine passage on reading a nation's strength with your fingertips.
• China　Overview: 2,700 years of the world　the present　Toward the First Nation to Abandon Paper Money
  Section 7. The country that invented banknotes is the first to abandon them—where things stand a thousand years after the Jiaozi.
• From reconstruction to the palm of the hand　Japan　2021　the Mint
  Section 8. Four hundred years folded into a three-layered cross-section. The culmination of modern material philosophy.
• Breaking Coinage　Greece　406/5 BC　Behind the mint
  This is an emergency coin with a bronze core covered in a thin layer of silver. Please observe what happens when a city's mark, which is supposed to guarantee the silver content, is stamped on something that is not silver.
• A memory called cowries　China　the 11th–8th centuries BC　A casting site in the Yellow River valley
  In a land where shells from the southern seas could not reach, bronze was used to copy their shape. Even when the material changed, the form alone remained, and from that point on, it was the shape that carried trust—this is a place where that reversal occurred.
• The republic and the escudo (2)　Portugal　1925　An inspection table in Lisbon
  Are banknotes printed by the same company using the same plates counterfeit? This case, where the object is genuine but the authority is false, directly answers the central question of this course.

Assessment

10 exercises in this course (7 check, 0 compare, 3 written). Progress is recorded by self-assessment.