Falling crime rates have been one of the great American success stories of the past 15 years. New York and Los Angeles, once the twin capitals of violent crime, have calmed down significantly, as have most other big cities. Criminologists still debate why: the crack war petered out, new policing tactics worked, the economy improved for a long spell. Whatever the alchemy, crime in New York, for instance, is now so low that local prison guards are worried about unemployment.

Lately, though, a new and unexpected pattern has emerged, taking criminologists by surprise. While crime rates in large cities stayed flat, homicide rates in many midsize cities (with populations of between 500,000 and 1 million) began increasing, sometimes by as much as 20percent a year. In 2006, the Police Executive Research Forum, a national police group surveying cities from coast to coast, concluded in a report called “A Gathering Storm” that this might represent “the front end … of an epidemic of violence not seen for years.”

If replacing housing projects with vouchers had achieved its main goal—infusing the poor with middle-class habits—then higher crime rates might be a price worth paying. But today, social scientists looking back on the whole grand experiment are apt to use words like baffling and disappointing. A large federal-government study conducted over the past decade—a follow-up to the highly positive, highly publicized Gautreaux study of 1991—produced results that were “puzzling,” said Susan Popkin of the Urban Institute. In this study, volunteers were also moved into low-poverty neighborhoods, although they didn’t move nearly as far as the Gautreaux families. Women reported lower levels of obesity and depression. But they were no more likely to find jobs. The schools were not much better, and children were no more likely to stay in them. Girls were less likely to engage in risky behaviors, and they reported feeling more secure in their new neighborhoods. But boys were as likely to do drugs and act out, and more likely to get arrested for property crimes. The best Popkin can say is: “It has not lived up to its promise. It has not lifted people out of poverty, it has not made them self-sufficient, and it has left a lot of people behind.”

Social Darwinism doesn't work; in an egalitarian society, the best don't rise.

What does happen is that the disorganized fall, but there's nowhere for them to go, and the egalitarian system supports them.

Who's going to end up poor? Addicts of drugs or sex; people of lower intellectual ability; people unable to stay focused on a task.

Why does this afflict minorities? Different cultures, different rules, and different types of intelligence, including different levels of IQ. To succeed in a Western society, you need an IQ of 110 or more at the absolute minimum.

So the egalitarian system is manufacturing its own nightmare by trying to keep us all together, and not letting some people segregate themselves into city projects. Do-gooder mentalities create paths to hell.