Racial classification is the practice of categorizing individuals into groups based on physical characteristics, such as skin color, facial features, and hair type. This system has been used historically to differentiate people and often reflects social, political, and economic contexts. The concept of race is complex and varies across cultures. While some classifications are based on observable traits, many scientists argue that race is a social construct rather than a strict biological category. This perspective emphasizes the shared genetic heritage among all humans, regardless of race or ethnicity.