That version of the past did not, but take into account the history of those Mexicans who had immigrated to the United States. It also gave little attention to the rights of undocumented immigrants in the United States in the 1960s— which is not surprising, since immigration did not have the political significance it later acquired. It was a decade later when activists, such as Bert Corona in California, embraced the rights of undocumented workers and helped broaden the movement to include their issues.