Value of $100 in 1925, adjusted to 1970

What happened to prices between 1925 and 1970

Between 1925 and 1970, the Consumer Price Index went from 17.5 to 38.8. Cumulatively, prices increased 121.7%, which works out to an average of 1.79% per year. Put differently, a dollar in 1925 bought what $0.45 buys in 1970.

Consumer prices rose 2.3% in 1925, the CPI’s largest single-year increase since the deflationary swings of the early 1920s, though still mild next to the double-digit inflation of the World War I years. The country’s cultural fault lines were on full display that summer in Dayton, Tennessee, where high school teacher John Scopes was tried July 10-21 for violating a state law against teaching evolution, a case that drew national press coverage and pitted prosecutor William Jennings Bryan against defense attorney Clarence Darrow. Real estate speculation, meanwhile, peaked in Florida, where buyers flipped undeveloped land in the Miami area on thin down payments, driving prices far above what the land itself could support; the bubble would collapse the following year. Detroit reshuffled that June too: Walter Chrysler reorganized the struggling Maxwell Motor Company into Chrysler Corporation, the start of what would become one of the American auto industry’s “Big Three.” First-class postage held at 2 cents for the sixth straight year.

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The destination year: 1970

Consumer prices rose 5.7% in 1970, up from 1969’s 5.5%, extending a run of faster price growth that stretched back to the mid-1960s, even as a recession that began in December 1969 pushed unemployment toward 6%. Prices and joblessness rising together confounded the era’s economic thinking, which held that policymakers could trade a little more inflation for a little less unemployment; 1970 was an early sign that trade-off was breaking down, a pattern that would harden into stagflation later in the decade. Washington restructured how it delivered mail that year: after postal workers staged the first strike ever by federal employees that March, Congress passed the Postal Reorganization Act in August, replacing the cabinet-level Post Office Department with the independent U.S. Postal Service. Environmental policy also took shape in 1970. An estimated 20 million Americans marked the first Earth Day on April 22, and the Environmental Protection Agency opened that December to enforce the Clean Air Act and the pollution rules that followed. The Vietnam War kept dividing the country: on May 4, National Guard troops fired on antiwar demonstrators at Kent State University in Ohio, killing four students and setting off strikes on hundreds of campuses. A median household earned $8,734 that year, a gallon of gas averaged 36 cents, and a first-class stamp cost 6 cents, the rate it had held since 1968. Prices stood 291.9% above their 1913 level by the end of 1970, a milestone that would look almost mild against the decade still to come.

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