The term "Caucasian race" traditionally refers to a group of people characterized by certain physical features, such as lighter skin tones, straight or wavy hair, and a variety of eye colors. This classification originated in the 18th century and was based on the belief that people from Europe, parts of North Africa, and the Middle East shared common ancestry. Caucasian is often used interchangeably with the term "white" in many contexts, particularly in the United States. However, it is important to note that race is a social construct, and the concept of the Caucasian race has evolved over time, leading to ongoing discussions about its relevance and accuracy in contemporary society.