I find this to be a trending view among Americans. That we're somehow becoming less civilized and things are getting worse. The 1950's is pointed to as the pinnacle but it only SEEMED that way b/c America at that time was a caste system.
However if you actually look at it from a world view, you'd find that we're far MORE civilized now than ever and we're far less violent now than ever. You're talking about Libia but the situation in Libia is mild compared to the cold war and any number of covert operations we did in the past. Gang activity actually peaked a long time ago.