There are four kinds of people. Who are they?

East Asian race (yellow race), Caucasian race (white race), African race (black race), Oceania race (brown race).

Yellow people are mainly distributed in Urals, East Asia, North Asia, Northeast Asia, Siberia, North South Asia, Southeast Asia and a few Americas and Oceania. The yellow race accounts for about 37% of the world population.

White people are also called Europeans and Caucasians. Originally thought that the yellow race is the most populous race in the world, but according to statistics, the white race is the most populous and widely distributed race in the world.

Black people in Africa are divided into many different types. The most common are the blacks in Sudan and the Bantu blacks. In addition, there are black and white Ethiopians and black and yellow Malagasy. The oldest races in the world-Ni grillo and Khoisan.

Brown people are the earliest inhabitants of Oceania, South Asia subcontinent and Nanyang Islands. They used to be widely distributed in Oceania, Southeast Asia and South Asia, but they were excluded by new immigrants after the arrival of whites and yellow people. At present, only melanesians and Papua people in Oceania are still the main residents of the islands, and the rest are only distributed in the mountains or deserts in some remote areas of Australia, the South Asian subcontinent and the Nanyang Islands.

origin of man

The distribution of modern people has experienced a long period of development, at least dating back to the second half of the late Pleistocene, that is, the late stage of Homo sapiens in the late Paleolithic period.

Late Homo sapiens is an early type of modern Homo sapiens, which has the characteristics of high and round head, relatively small face, low eyebrow arch and prominent chin. The earliest group of late Homo sapiens, which is widely distributed on the earth, accumulated cultural and physical genetic differences, and further expanded and changed in the next 35 thousand years, forming the characteristics and distribution of all living races.

Like the process of animal species generation and differentiation, the natural process of forming modern human race is still controlled by four basic factors: gene mutation, random diffusion of variation, migration and natural selection.

Under the influence of these factors, living races show different degrees of differences in some morphological characteristics and some biochemical characteristics, including ABO, Rh, MN and other blood group systems, the existence or occurrence frequency of some genetic diseases, and genetic resistance to some diseases.

Refer to the above? Baidu encyclopedia-race