Holman W. Jenkins, Jr. for The Wall Street Journal has the interview, here:
We know that, in good times and bad, and in all countries, the majority of crime is committed by a small minority of young men. A landmark study by Marvin Wolfgang, for instance, showed that 6% of 18-year-olds were responsible for 52% of the crime committed by the cohort.
In the 1960s, the baby boom obviously enlarged the number of male teenagers, but what also changed conspicuously was the type of crimes they committed, from petty theft and the like to more serious crimes, such as armed robbery, grand larceny and homicide.
"So there was cultural change as well as a numerical change, and what caused the culture change? Whatever it was, it was powerful. I think it's best summarized by saying people abandoned the idea that self-control was the standard by which life should be led. That's my rough summary of what the '60s meant. . . .."
It all seems so obvious now, but so elusive when we were living it.