https://www.britannica.com/topic/race-human
At no point, from the first rudimentary attempts at classifying human populations in the 17th and 18th centuries to the present day, have scientists agreed on the number of races of humankind, the features to be used in the identification of races, or the meaning of race itself. Experts have suggested a range of different races varying from 3 to more than 60, based on what they have considered distinctive differences in physical characteristics alone (these include hair type, head shape, skin colour, height, and so on). The lack of concurrence on the meaning and identification of races continued into the 21st century, and contemporary scientists are no closer to agreement than their forebears. Thus, race has never in the history of its use had a precise meaning.
Although most people continue to think of races as physically distinct populations, scientific advances in the 20th century demonstrated that human physical variations do not fit a “racial” model. Instead, human physical variations tend to overlap.
There are no genes that can identify distinct groups that accord with the conventional race categories. In fact, DNA analyses have proved that all humans have much more in common, genetically, than they have differences. The genetic difference between any two humans is less than 1 percent. Moreover, geographically widely separated populations vary from one another in only about 6 to 8 percent of their genes. Because of the overlapping of traits that bear no relationship to one another (such as skin colour and hair texture) and the inability of scientists to cluster peoples into discrete racial packages, modern researchers have concluded that
the concept of race has no biological validity.