You have a highly selective and biased memory in your usage of "history". Such methodologies to overcome existing groups goes back way beyond the 19th and 20th centuries and involves peoples from a wide variety of relative indigenous backgrounds over several millenia. You may wish to study the Proto-Indo-European etymological base of the word "colony" as a starting point.Actually history shows us divide and rule was a very much used strategy by colonialists who were cough cough white in the main
If you cant beat em f""k em