Do Fatherless Children Cause Crime?

John Leo argues fatherless children are a problem:

One study, judged most important by the institute, found that divorce rates had no relationship to violent crime rates but that out-of-wedlock births had a strong relationship to youth crime--nearly 90 percent of the increase in violent crime between 1973 and 1995 was accounted for by the rise in out-of-wedlock births.