instead of interbreeding with the native populations, the colonists either outright replaced them or simply ruled over them. there is a strong divide between primarily bitish and primarily native former colonies. while the usa, canada, australia, and new zealand turned out well others like india and jamacia are not nearly as successful. this can be easily seen in the former colonies of south africa and rhodesia, which upon transitioning from british colonist rule to local population rule became dramatically worse. the former spanish colonies of argentina and chile are markedly better off than many of their compatriots for similar reasons.
United States