For these reasons the distinction between "white" and "mixed", and between "mixed" and "black" and "indigenous", is largely subjective and situational, meaning that any attempt to classify by discrete racial categories is fraught with problems.
People of European origin began to arrive in the Americas in the 15th century.
Mexico’s northern and western regions have the highest percentages of European population, according to the American historian Howard F.
Cline the majority of Mexicans in these regions have no native admixture and their aspect resemble that of northern Spaniards.
Latin American countries have often encouraged miscegenation, and even a small amount of European ancestry could entail significant upwards social mobility.
In the 20th century international political instability was a key factor to drive immigration to Mexico, in this era Greeks, Romanians, Portuguese, Armenians, Poles, Russians, Lebanese, Palestinians and Jews, whereas in the 21th centrury, due to Mexico's economic growth, immigration from Europe has increased (mainly France and Spain), people from the United States have arrived as well, nowadays making up more than three-quarters of Mexico’s roughly one million documented foreigners.
In that time, more people from the United States have been added to the population of Mexico than Mexicans to that of the United States, according to government data in both nations.
Being white is a term that emerged from a tradition of racial classification that developed as Europeans colonized large parts of the world and employed classificatory systems to distinguish themselves from the local inhabitants.
However, while most present-day racial classifications include a concept of being white that is ideologically connected to European heritage and specific phenotypic and biological features associated with European heritage, there are differences in how people are classified.White is the self-identification of many Latin Americans in some national censuses.