I agree it existed, in fact I have acknowledged the fact it existed in the past several times now much like white privilege existed in the past. I don't even know if you could even use those terms to describe past injustices to black people, because black people didn't even have rights, they didn't even have citizenship, it wasn't even a crime, it was the standard of the time. That's not how it works. If someone claims something and provides evidence to backup their initial claim then yes the burden of proof is on the counter-claimer to provide evidence to the contrary, but if someone makes a blanket statement without proof, then the burden is on them to prove their claims to the counter-claimer. This is common on here with blanket statements, however Estebonrober does regularly offer proofs for his/her claims. Not saying I'm perfect I've posted blanket statements on here without proof we all do it, but I don't mind being called out for the burden of proof. Besides that point I have provided counter arguments and evidence to systemic racism claims in various threads on here.