But as long as the Times has such a burning interest in the root causes of murder, how about considering the one factor more likely to create a murderer than any other? That is the topic we're not allowed to discuss: single motherhood.

As I describe in my new book, "Guilty: Liberal 'Victims' and Their Assault on America," controlling for socioeconomic status, race and place of residence, the strongest predictor of whether a person will end up in prison is that he was raised by a single parent. (The second strongest factor is owning a Dennis Kucinich bumper sticker.)

By 1996, 70 percent of inmates in state juvenile detention centers serving long-term sentences were raised by single mothers. Seventy percent of teenage births, dropouts, suicides, runaways, juvenile delinquents and child murderers involve children raised by single mothers. Girls raised without fathers are more sexually promiscuous and more likely to end up divorced.

A 1990 study by the left-wing Progressive Policy Institute showed that, after controlling for single motherhood, the difference in black and white crime disappeared.

Various studies come up with slightly different numbers, but all the figures are grim. A study cited in the far left-wing Village Voice found that children brought up in single-mother homes "are five times more likely to commit suicide, nine times more likely to drop out of high school, 10 times more likely to abuse chemical substances, 14 times more likely to commit rape (for the boys), 20 times more likely to end up in prison, and 32 times more likely to run away from home."

With new children being born, running away, dropping out of high school and committing murder every year, it's not a static problem to analyze. But however the numbers are run, single motherhood is a societal nuclear bomb.

Many of these studies, for example, are from the '90s, when the percentage of teenagers raised by single parents was lower than it is today. In 1990, 28 percent of children under 18 were being raised in one-parent homes -- mother or father, divorced or never-married. By 2005, more than one-third of all babies born in the U.S. were illegitimate.

That's a lot of social problems in the pipeline.

Think I'm being cruel? Imagine an America with 60 to 70 percent fewer juvenile delinquents, teenage births, teenage suicides and runaways, and you will appreciate what the sainted "single mothers" have accomplished.

Even in liberals' fevered nightmares, predatory mortgage dealers, oil speculators and Ken Lay could never do as much harm to their fellow human beings as single mothers do to their own children, to say nothing of society at large.

But the Times won't run that series because liberals adore single motherhood and the dissolution of traditional marriage in America. They detest the military, so they cite a few anecdotal examples of veterans who have committed murder and hope that no one asks for details.