Opposition to miscegenation, framed as preserving so-called racial purity , is a typical theme of racial supremacist movements. Although the term "miscegenation" was formed from the Latin miscere "to mix" plus genus "race" or "kind", and it could therefore be perceived as value-neutral, it is almost always a pejorative term used by people who believe in  racial superiority and purity. In Spanish America, the term mestizaje , which is derived from mestizo —the blending of European whites and Indigenous peoples of the Americas , is used to refer to production of offspring by people considered to be of different racial types. In the present day, the word miscegenation is avoided by many scholars, because the term suggests that race is a concrete biological phenomenon, rather than a categorization imposed on certain relationships.
Multiracial Americans - Wikipedia
Multiracial Americans are Americans who have mixed ancestry of two or more races. The term may also include Americans of mixed race ancestry who self-identify with just one group culturally and socially cf. In the US census , approximately 9 million individuals, or 2. Historical reasons, including slavery creating a racial caste and the European-American suppression of Native Americans, often led people to identify or be classified by only one ethnicity, generally that of the culture in which they were raised. After a lengthy period of formal racial segregation in the former Confederacy following the Reconstruction Era and bans on interracial marriage in various parts of the country , more people are openly forming interracial unions. In addition, social conditions have changed and many multiracial people do not believe it is socially advantageous to try to " pass " as white. Diverse immigration has brought more mixed race people into the United States, such as a significant population of Hispanics identifying as mestizos.
Though one country politically, the genetics of indigenous Mexicans shows that their ancestors were very distinct groups that mixed remarkably little. A study published today in Science found more genetic isolation than expected among these populations. It was "kind of surprising," he said, that this "plays out even though there's been years of admixture, huge amounts of population growth, and lots of migration and movement.
AUSTIN— Today, the population of South Asia is divided into dozens of ethnic, linguistic, and religious groups that live side by side—but not always in harmony. Now, a study of the first ancient DNA recovered from South Asia shows that populations there mingled repeatedly thousands of years ago. Three similar groups also mingled in ancient Europe, giving the two subcontinents surprisingly parallel histories. The study, presented here last week at the meeting of the American Association of Physical Anthropologists and in a preprint on the bioRxiv server , sheds light on where these populations came from and when they arrived in South Asia. It also strengthens the claim that Proto-Indo-European PIE —the ancestral language that gave rise to modern languages from English to Russian to Hindi— originated on the steppes of Asia.