Have you ever wondered why governments today manage the economy so cautiously? The answer lies in an event that shaped the entire 20th century: the Great Depression.

There was a period in history when the global economy nearly collapsed entirely. Starting in October 1929 with what was called Black Tuesday, the Great Depression lasted throughout the 1930s and left deep scars on the entire global economy. Unemployment reached up to 25% in some countries, countless businesses went bankrupt, and millions of people lost all their savings overnight.

But interestingly, the cause of the Great Depression was not due to a single event but a series of consecutive failures. First was the stock market crash. During the 1920s, there was a lot of speculation in the stock market, leading to artificially inflated stock prices. When investors lost confidence, stock prices plummeted uncontrollably. Millions of Americans—many investing with borrowed money—lost everything in a single night.

Then, the banking system began to collapse. As panic spread, people rushed to withdraw their money simultaneously. Banks did not have enough reserves, so they failed one after another. Without deposit insurance or protective regulations, when a bank closed, the entire community lost their lifelong savings. Credit lines dried up, affecting every sector of the economy.

The problem worsened when governments imposed protective tariffs. The U.S. passed the Smoot-Hawley Tariff Act of 1930, hoping to protect domestic industries. But this only prompted retaliations from other countries, leading to a sharp decline in global trade. European countries, already weakened by World War I, were hit even harder.

With unemployment soaring, people cut back on spending. Businesses had fewer customers, so they laid off workers. Laid-off workers reduced their spending further. It was a vicious cycle with little chance of escape.

The impact of the Great Depression was global. In major cities, charity kitchens and free food distribution centers became common. Thousands of businesses—from small local shops to large industrial corporations—went bankrupt. The decline in production spread through supply chains and entire communities. Economic hardship even contributed to social unrest and political changes in many countries.

The road to recovery was long and bumpy. In the U.S., President Franklin D. Roosevelt implemented the New Deal—a series of ambitious relief and reform policies. Initiatives included public works projects to create jobs, establishing agencies to oversee banks and stock markets. Many developed countries also introduced unemployment insurance, pension schemes, and other social welfare programs.

But it was the outbreak of World War II that truly accelerated the recovery. Governments invested resources into industry and infrastructure, boosting production and employment.

Looking back, the Great Depression left invaluable lessons. Policymakers developed a more interventionist approach, with the government taking greater responsibility for managing the economy. Regulatory agencies introduced important reforms, including deposit insurance, securities regulations, and social safety nets.

Today, when we see financial crises or economic downturns, we can see the fingerprints of the Great Depression—lessons from the past still guiding how leaders and experts handle current challenges. That’s why understanding these historical events is so important.