This past January, almost exactly 20 years after its publication, Tucson schools banned the book I co-edited with Bob Peterson, Rethinking Columbus. It was one of a number of books adopted by Tucson’s celebrated Mexican American Studies program — a program long targeted by conservative Arizona politicians.

The school district sought to crush the Mexican American Studies program; our book itself was not the target, it just got caught in the crushing. Nonetheless, Tucson’s — and Arizona’s — attack on Mexican American Studies and Rethinking Columbus shares a common root: the attempt to silence stories that unsettle today’s unequal power arrangements.

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For years, I opened my 11th-grade U.S. history classes by asking students, “What’s the name of that guy they say discovered America?” A few students might object to the word “discover,” but they all knew the fellow I was talking about. “Christopher Columbus!” several called out in unison.

“Right. So who did he find when he came here?” I asked. Usually, a few students would say, “Indians,” but I asked them to be specific: “Which nationality? What are their names?”

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