"It goes back to the 1600s. The wizarding society used to associate with the non-magical society all the time. And unfortunately, a few non-magical people tried to take advantage of the wizarding folk. Things got tense. Wizards cast spells to protect themselves. Non-magical people resorted to violence, actually killing others."

Hermione frowns. "But now that we have so many wizards being born from non-magical people, times must change."