Original sentence: In the Nolan chart, the traditional left-right spectrum forms a diagonal across the plane, with communism and fascism both in the ultra-communitarian corner of the plane (which is hotly disputed by more liberal-minded communists who do not advocate state control over matters of "personal freedom")
Edited sentence: This has the interesting effect that the traditional left-right spectrum forms a diagonal across the plane, with communism and fascism both in the ultra-communitarian corner of the plane (something which is hotly disputed by more liberal-minded communists who do not advocate state control over matters of "personal freedom")