Source: Philadelphia Inquirer
May 25, 2010
[Jonathan Zimmerman teaches history at New York University and lives in Narberth. He is the author, most recently, of "Small Wonder: The Little Red Schoolhouse in History and Memory" (Yale University Press). He can be reached at jlzimm@aol.com.]
In the late 1840s, following a brief war with Mexico, the United States acquired the present-day states of California, Nevada, and Utah, along with parts of Colorado, Arizona, New Mexico, and Wy