What most definitions have in common is an attempt to categorize peoples primarily by their physical differences. In the United States, for example, the term race generally refers to a group of people who have in common some visible physical traits, such as skin colour, hair texture, facial features, and eye formation. A race is a grouping of humans based on shared physical or social qualities into categories generally viewed as distinct by society. The term was first used to refer to speakers of a common language and then to denote national affiliations
