Really? You think Mexican drug cartels and Islamic fundamentalists were decapitating, shooting and blowing up people by the thousands? Did you know that the Mexican cartels have killed about 47000 people since 2000? How many wars were going on in the 1930s? NONE! The only thing that could be considered similar was the mobs and they weren't operating world-wide to the extent gangs are now. The US had less than 150 Million people and we have more than double that number now.
I'm 55 and I remember the early '60s vividly. If someone killed another person, it would definitely have made the news and I never wear rose colored glasses when I think about the past.
The homocide rate in the US between 1920 and 1940 was higher than it is today.
I'm sure the drug cartels were still killing people, just not in the numbers that they are now, but then other groups are less active now than they were then. Swings and roundabouts, there are always people killing each other.
Relic also makes a great point about eastern-europe/the soviet block. The "great purge" and the rise of Stalin killed millions.
If someone killed another person, it made the news, but where were they? In another town? Another state? Another country? Just looking at the US There were 9,110 murders in the US in 1960. I suspect the tiniest fraction of that made it beyond the local news.
179.3 million people in the US in 1960, 9,110 murders.
308.7 million people in the US in 2010, 14,748 murders.
Murder rate in 1960: ~5 per 100,000
Murder rate in 2010: ~4.7 per 100,000
On that front, things haven't changed much.
News didn't travel as far or as fast (unless it was major). Heck, look at what happened with Chernobyl, that was only '86 and it took days (if not weeks) for information to start hitting western shores (granted, much of that was political, but something that big would not be withheld by time these days, because of the mass availability of mobile tech).
Compare the news breaking on Chernobyl to that of the World Trade Center attacks, which were almost instant, so much so that most of the world saw the second plane hit live.