Systemic racism has existed as long as concepts of race exist. No one needed to create an intentional system that favors the dominant ethnicity.
Scientific racism was created in France to justify the enslavement of African Christians as normally it is illegal in canon law to enslave another Christian. The UK and other Northern European nations embraced these concepts and built upon them.
Im guessing you never watched cable tv in the US between 1993-2005. There was a guy who ran a whole business connecting people with this.