Kris Klein Hernández is a U.S. historian of race, gender, and sexuality whose scholarship is located at the nexus of borderlands history and comparative ethnic studies. He specializes in comparative racialization, militarization, and sexuality in the long 19th century, with a focus on the geography of the U.S.-Mexico boundary. He teaches courses on 19th century U.S. history; borderlands history; Vast Early America; settler colonialisms; comparative ethnic histories; U.S. imperialism and empire; and sexuality from the early republic to the present.