CNN recently featured an article by Tomás R. Jiménez, an assistant professor of sociology at Stanford University and an Irvine Fellow at the New America Foundation, who wrote about how “Mexican-Americans have deep ties to the U.S.”

Jiménez begins:

Just about any celebration of Hispanic Heritage Month (September 15 – October 15) will highlight the diversity among Hispanics. They come from different parts of the Spanish-speaking world, have settled in various areas of the United States, have distinctive customs and come in all shapes and colors.

But an often overlooked difference among Hispanics relates to how many generations back they trace their roots in U.S. history.

Hispanics are not just immigrants or the U.S.-born children of immigrants. They are also Americans with deep family histories in the United States. This is especially true of the Mexican-origin population, the largest Hispanic subgroup and one that has been continually replenished by immigrant newcomers for a century.

He continues:

Truly knowing what it means to be a person of Mexican origin requires understanding the experiences of the nearly 3 in 10 (8.5 million) Mexican-Americans who were born in the United States to U.S.-born parents.

These later-generation Mexican Americans’ experience in the United States, though rooted in a distant past, is nonetheless deeply affected by current and uninterrupted immigration from their ancestral homeland.

In some ways, Mexican Americans have lived what amounts to a classic tale of assimilation.

They speak English (and no Spanish in the majority of cases), intermarry in large numbers, live in ethnically mixed neighborhoods, work in just about every imaginable profession, are honored on Memorial Day and Veterans Day, occupy important political positions and are highly patriotic. But ongoing Mexican immigration puts a twist on this classic assimilation tale, making “Mexicanness” relevant to later-generation Mexican-Americans in both problematic and enjoyable ways.

It can be tough being a member of an ethnic group that is so synonymous with immigration. Even if their immigrant ancestors came early in the 20th century, continuous immigration means that Mexican Americans are never safe from erroneous assumptions that they are foreigners.

Jiménez concludes:

As we celebrate Hispanic Heritage Month and recognize all of the diversity among Hispanics, it begs the question: How do we know what it means to be Hispanic?

The answer can only be arrived at by appreciating the experiences of those Hispanics whose families have called the United States home for several generations and those who more recently have come to call this land their home. No matter how deep or shallow their roots extend into American history, what almost all Hispanics have in common is that immigration profoundly defines their experience.

Read more of his fascinating article at CNN.com.