I don't remember there being any mass random shootings in the '60's, '70's, 80's or hearing about any going further back in time. It wasn't until the mid '90's that these events (as rare as they are) started happening. That's not decades ago, just about 17 years ago. So, what has changed?
just because you don't remember doesn't mean they didn't happen. they absolutely did. there were more mass shootings in the the 80's than there have been since the year 2000. there were mass shootings in the 20's. they are actually in decline right now, with the 80's and 90's being the two decades with the most. video games are more realistic than ever. what's changed you ask? the media. you don't remember because there wasn't a constant 24 hour news cycle back then but they were happening