The Oil Shocks of the 1970s

How two sudden oil price spikes in the 1970s exposed how dependent modern economies had become on cheap energy.

For most of the twentieth century, oil was cheap and abundant enough that most economies barely had to think about where their energy came from. The oil shocks of the 1970s shattered that assumption twice within a single decade, revealing just how much modern economic life depended on a steady, affordable supply of a resource controlled largely by a small group of producing nations.

The 1973 embargo

In October 1973, several major oil-producing nations imposed an oil embargo - a deliberate halt of oil exports - against countries that had supported Israel during that year’s Arab-Israeli war. The embargo, combined with production cuts by the OPEC oil cartel, caused oil prices to roughly quadruple within months. Because oil powered transportation, heating, and a huge share of industrial production across the affected countries, this price shock rippled through nearly every part of the economy almost immediately.

Gas lines and rationing

Waiting in line for a tank of gas

In the United States, the sudden supply disruption led to gas stations running dry, hours-long lines at the pumps that still had fuel, and some states resorting to odd-even rationing - allowing only cars with license plates ending in an odd or even number to buy gas on alternating days. This wasn't simply an inconvenience: it was a visceral, everyday demonstration to millions of ordinary people of just how completely daily life depended on a steady, affordable flow of oil that most had previously taken entirely for granted.

The second shock, 1979

A second oil shock hit in 1979, triggered by the Iranian Revolution disrupting that country’s oil production and exports. Though the actual physical supply shortfall was smaller than in 1973, panic buying and speculation pushed prices sharply higher again, roughly doubling oil prices within about a year and compounding the economic strain many countries were already dealing with from the first shock’s lingering effects.

Exposing energy dependence

Both shocks revealed the depth of energy dependence many industrialized economies had built up - reliance on imported oil, often from a relatively small handful of exporting countries, for a large share of total energy needs. This vulnerability directly reshaped policy for decades afterward: countries invested heavily in energy efficiency, expanded domestic oil and gas production where possible, built out nuclear power, and began establishing a strategic reserve - large government-held stockpiles of oil specifically meant to cushion the economy against future supply disruptions.

The connection to stagflation

These oil shocks were a central driver of the stagflation covered elsewhere in this module - the unusual combination of high inflation and weak economic growth that plagued much of the 1970s. Because oil was such a fundamental input across the economy, its sudden, sharp price increases pushed prices higher for a huge range of other goods and services simultaneously, while also slowing overall economic activity as businesses and consumers absorbed the shock.

Key takeaways

The 1973 oil embargo roughly quadrupled oil prices within months, disrupting economies dependent on cheap oil.
Gas lines and rationing made the shock a visible, everyday experience for ordinary people, not an abstract economic event.
A second shock in 1979, tied to the Iranian Revolution, roughly doubled prices again amid panic buying.
Both shocks exposed how dependent industrialized economies had become on imported oil from a few exporting nations.
The shocks were a major driver of 1970s stagflation and led to lasting policy changes around energy efficiency and reserves.