I stand corrected, medieval London was safer than Johannesburg. Current london has 18.4 murders per million residents, which gives us a range of 276 to 368 murd

I stand corrected, medieval London was safer than Johannesburg. Current london has 18.4 murders per million residents, which gives us a range of 276 to 368 murders per million for medieval London (15-20x). Last year Johannesburg had 68.3 murders per 100,000, or 683 per million. So current Johannesburg is roughly twice as dangerous per capita than medieval London.