While it's totally understandable once one looks into the historical context and notes similar patterns in other non-caucasian cultures, the use of the term 'white' in this context has become so confusing and problematic as to perpetuate the very problems it's trying to identify. Unfortunately a lot of the obvious alternatives are similarly problematic, and I haven't been able to think of a good novel one. My favorite term is 'authoritarian' but 6-syllable words are also a good way to lose a large part of your potential audience :-/

To me what you hint at is that since the 15th century, europeans were into the imperialism race. They were the most recent and largest default ethnic group.