Comment by techjamie

It's the same token as more people dying from cancer than ever before. Yes, modern society creates many more cancer patients than ever, but less people are dying early from things that aren't cancer than ever.

We live in a society that, for the most people, has the best quality of life than ever in history. But in having that increase, we eliminate many problems that must be replaced by other problems.

In this case, a mental health crisis comprised of people who either wouldn't have survived to that point, or whose results went unremarked or shrugged off as something else in the past. In terms of violent outbursts, we also have easier access to more destructive weapons (even those that aren't guns) and more density of population on whom violence can be inflicted.