The term was revived in the 1960s by Chicano ethnic group MEChA to refer to Mexican Americans in the United States and the people in Mexico as a unified "race", similar to the black and white races. In this sense it is largely synonymous to the notion of the Chicano nation. The decision to call it a separate "race" may have been influenced by the contemporary negative views of "ethnic" or "nation" based nationalism and positive views of "race" based nationalism. The notion was first enunciated in the Plan Espiritual de Aztlán document.