We know this statement is going to be pretty controversial down in the comments section, but we're going to say it and stand by it: the Black Death was bad. We want to make it clear right off the bat that when we talk about a silver lining, we are not advocating that the Black Death be brought back. We would not support any such proposal.
The Black Death, a.k.a. The Plague, utterly ravaged humanity, killing between 30 and 60 percent of Europeans, and dropping the population of the entire world by 20 percent by some estimates. The Plague came in three forms. Bubonic was the most common and easiest to spot: Sufferers developed huge buboes under the armpits, on the neck and in the groin, which grew to the size of a small apple or egg.
Death often occurred less than a week after infection. Pneumonic was the second most common form, and it infected the lungs. It also had a mortality rate of 95 percent, which seems impressive until you learn that Septicemic Plague, the third variety, had a mortality rate close to 100 percent, and even today there is no cure for it.
The only reason that the two latter examples were rare is because they killed so quickly that you didn't have time to pass it on before you died. Much like attacking Bruce Willis on Christmas, if you contracted Septicemic Plague, your life expectancy was about a day, and the end was not going to be pretty.
The Silver Lining:
The birth of the freaking modern world.
So how could one of the deadliest pandemics in human history have any positive outcomes?
Well, before the plague there had been massive overpopulation in many European countries, the likes of which the world really hadn't seen to that point. Along with it came famine, poor sanitation, overcrowding; all of which helped to accelerate the progress of infectious diseases like, well... like the plague. Disease, starvation and predators make up Mother Nature's three-pronged population control failsafe, and things had gotten to the point where it was going to be the Plague or lions.
So, what'll it be?