What brought about the concept of the Angelo Saxon race?

The concept of the Anglo-Saxon race emerged in the 19th century as a result of nationalist sentiments and racial theories prevalent during that time. It was used to describe the perceived superiority of the Anglo-Saxon peoples, primarily in Britain and the United States, often linked to ideas of racial purity and cultural dominance. This notion was fueled by colonial expansion and a desire to justify Imperialism, as proponents claimed that Anglo-Saxons were culturally and racially superior to other groups. The idea has since been widely discredited and criticized for its ethnocentrism and association with racial discrimination.