But all capitalism that has ever actually existed has required and implemented force in order to function. Capitalism can not exist without systematic violence.

This is from the Wikipedia you just cited...

Person A: "No Scotsman puts sugar on his porridge."
Person B: "But my uncle Angus likes sugar with his porridge."
Person A: "Ah yes, but no true Scotsman puts sugar on his porridge."

Compare that to the following:

A: Capitalism doesn't require violence in order to function.
B: But literally every capitalist economy is underwritten by violence.
A: Yes, but pure capitalism doesn't require violence.

See?