Ethnic Mexicans invented it for themselves. Whether they did so in the borders of the U.S. or Mexico is irrelevant, especially since the different ethnicities in the U.S. were much less integrated then than they are now.<p>I.e. there wasn&#x27;t some magical discontinuity at the border that means it made more sense to count Mexican-Americans of that era as more closely similar to Anglo-Saxon Americans than to Mexican nationals. It happens that the Burrito was invented near the northern end of where ethnic Mexicans lived but that doesn&#x27;t seem to say much about the type of palate it was created for.