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Before banks: the temple safe

Long before banks, religious institutions held the world's savings. Egyptian temples accepted grain deposits and issued receipts. Greek and Roman temples did the same with metal. The idea was simple: a sacred place is the safest place — and gods are good auditors.

The Italian invention

Modern banking — depositing money, lending it out at interest, transferring it across distances — was invented in medieval Italy, especially in Florence, Venice, and Genoa during the 12th–14th centuries.

The word "bank" comes from the Italian banca, the bench on which money changers worked. When a merchant defaulted, his bench was broken — *banca rotta*, the origin of "bankrupt."

The Medici dynasty

The Medici Bank of Florence became the most powerful financial institution of the 15th century. Branches across Europe handled letters of credit, currency exchange, and lending to popes and kings. The Medici essentially invented modern correspondent banking — a network of trusted partners across cities.

When the Medici declined, no single institution replaced them for over a century.

The first central banks

These early central banks set the template: a special institution responsible for currency, with privileges and obligations no commercial bank could match.

The age of branches and panics

The 19th century saw the rise of branch banking, joint-stock banks, and national banking systems. It also saw repeated panics — bank runs that wiped out depositors before deposit insurance existed.

The U.S. alone suffered major panics in 1819, 1837, 1857, 1873, 1893, and 1907. The 1907 panic was severe enough to trigger the creation of the Federal Reserve in 1913.

The 20th century: regulation and depression

After the Great Depression, governments built the modern banking framework:

Banking became the most regulated industry on Earth — a trade-off for stability after decades of crises.

The big-bang era

The 1980s and 1990s deregulated banking globally. Investment banks merged with commercial banks. Cross-border lending exploded. New products (derivatives, securitization) reshaped risk.

The expansion ended in tears with the 2008 global financial crisis. Massive bailouts, new regulations (Dodd-Frank, Basel III), and stress testing followed. Banking became safer — and slower.

The fintech revolution

Since 2010, technology has rebuilt parts of banking from outside the traditional system:

Traditional banks are still where most money sits, but the user experience and pricing of moving money have improved dramatically because of fintech competition.

What banking is for, ultimately

Banks do four things society can't easily do without:

  1. Safekeeping — a place to store money you don't want to lose.
  2. Payments — moving value reliably.
  3. Maturity transformation — taking short-term deposits and making long-term loans.
  4. Trust — reducing the cost of making strangers transact.

Every innovation that survives is just a better way of doing one of these four things.

Key takeaways

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