So let me get this right:
1. The property and violent crime rates track almost together. The violent crime rate peaked in 1990, and the property crime rate peaked in 1980, both coming back approximately to their 1968 level.
2. Divorce rates peaked in about 1980s, and has fallen slightly since, but has not dipped past the 1973 level of about 16%. In 1968 the divorce rate was about 12%. I couldn't find a track with crime, but I don't dig charts unless they're obviously screaming in my face, so don't take it as an argument against your point.
3. The marriage rate has been falling, and the amount of single-parent households has been rising since 1950, as well as the fertility rate for unmarried females.