1973: the day the invincible grid became vulnerable.
On October 17, 1973, OPEC announced an oil embargo against the United States in retaliation for American support of Israel during the Yom Kippur War. Within weeks, oil prices quadrupled. Gas station lines stretched for blocks. And electric utilities — many of which burned oil to generate power — faced a crisis they had never imagined.
The vertically integrated utility was built on the assumption of cheap, abundant fuel. Coal, oil, natural gas — whatever the boilers needed, the railroads and pipelines delivered. The monopoly franchise model had never contemplated a world where the fuel itself became a strategic weapon wielded by foreign governments. The grid's great weakness was suddenly, painfully visible: total dependence on fossil fuels with no diversity, no flexibility, and no market mechanism to signal scarcity or reward alternatives.
The 1973 oil shock was followed by a second shock in 1979, triggered by the Iranian Revolution. Between them, oil prices rose tenfold from their 1972 levels. For utilities that burned oil, this was catastrophic. For regulators using cost-of-service models, it was a nightmare: utilities filed for emergency rate increases faster than commissions could process them.
But the crisis revealed something deeper than fuel cost volatility. The vertically integrated model had no mechanism for adaptation. A utility could not quickly switch from oil to coal. It could not buy power cheaply from a neighbor with excess capacity without complex bilateral negotiations. It could not call on customers to reduce demand because it had never built the tools to measure or reward conservation.
The crisis galvanized Congress. In 1978, President Carter signed the National Energy Act, a package of five bills designed to reduce America's fossil fuel dependence. The most consequential for electricity markets was the Public Utility Regulatory Policies Act of 1978 — PURPA.
PURPA's premise was radical: if utilities were too captive to fossil fuels, force them to buy power from independent generators who could use alternative fuels — small hydro, geothermal, wind, industrial cogeneration. These "Qualifying Facilities" (QFs) would be paid the utility's "avoided cost" — what the utility would have paid to generate the power itself. For the first time in American history, an entity other than a regulated utility had a legal right to sell power to the grid.
The era of the electricity monopoly was not yet over. But its foundations had just cracked.
The oil crises forced energy policy to develop an entirely new vocabulary: demand response, conservation, fuel diversity, energy independence. These concepts — obvious in hindsight — had never needed to exist in a world of cheap abundant fuels managed by regulated monopolies. The crises didn't just raise electricity prices. They planted the intellectual seeds of deregulation by proving, beyond doubt, that the monopoly utility was neither as efficient nor as resilient as its defenders claimed.
October 17, 1973. OAPEC's oil embargo announcement landed in utility boardrooms across America with immediate force. Oil-fired generation accounted for roughly 15 percent of U.S. electricity supply, and in New England the figure was far higher — some states depended on oil for the majority of their power. Fuel oil prices quadrupled in a matter of months. State public utility commissions were flooded with emergency rate filings as utilities sought to pass through costs that rate-of-return regulation had never anticipated. The crisis made visible a structural reality that the regulated monopoly system had masked for decades: centralized utilities built around a single fuel source had no resilience, and no competitive mechanism existed to drive efficiency or fuel diversification. Congress debated energy policy for five years before the National Energy Act of 1978 finally created the legal framework for change.
RMI — "What Did the 1973 Oil Embargo Teach Us?" Wikipedia — 1973 Oil Crisis