Historically Thinking
Historically Thinking
Corn Syrup
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Corn Syrup

Brian Leech does local history, regional history, labor history, environmental history, and food history

Originally published on July 29, 2026 (Episode 468).

Introduction

In early 1965, three executives boarded a plane in Japan, bound for the United States. “Unbeknownst to the U.S. Customs, they were carrying corporate secrets. Each man had carefully placed two vials of an isomerase enzyme into their pockets before the flight.” With it, they would change the world. For after two arduous years of nearly aerobic chemical engineering, their corporation produced what it called Isomerose 30. We know it, or its technically improved successors, as corn syrup.

That’s how my guest Brian Leech begins his intricate, multi-valenced history of what went on in Clinton, Iowa, from the 1960s through the 1980s. It’s food history, it’s labor history, it’s technological history, it’s environmental history, it’s regional history—“and not any single one of them, which is to say,” to quote the great Edmund Morgan, “that it is good history.”

If you enjoy discovering the unexpected histories behind the ordinary objects of everyday life—from food and technology to work and politics—subscribe to Historically Thinking. Every week we explore how the familiar became possible, and why those stories still matter.

About the Guest

Brian James Leech is Professor of History at Augustana College. His work ranges across labor, environmental, and urban history, often focusing on the American Midwest. He is the author of The City That Ate Itself: Butte, Montana and Its Expanding Berkeley Pit and has long explored how industry, communities, and landscapes shape one another. This is his third appearance on Historically Thinking.

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If this episode changed the way you think about high-fructose corn syrup—or about the Midwest itself—share it with someone who enjoys seeing familiar things through the lens of history.

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Tags

Food History • Labor History • Environmental History • Technology • Midwest • Iowa • Corn • Corn Syrup • Industrial History • Agricultural History • Brian Leech

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