A virulent antipolice campaign over the past year—initially fueled by a since-discredited narrative about a police shooting in Ferguson, Mo.—has made police officers reluctant to do their jobs. The Black Lives Matter movement proclaims that the police are a lethal threat to blacks and that the criminal-justice system is pervaded by racial bias. The media amplify that message on an almost daily basis. Officers now worry about becoming the latest racist cop of the week, losing their job or being indicted if a good-faith encounter with a suspect goes awry or is merely distorted by an incomplete cellphone video.

With police so discouraged, violent crime has surged in at least 35 American cities this year. The alarming murder increase prompted an emergency meeting of the Major Cities Chiefs Association last month. Homicides were up 76% in Milwaukee, 60% in St. Louis, and 56% in Baltimore through mid-August, compared with the same period in 2014; murder was up 47% in Minneapolis and 36% in Houston through mid-July.

But something more fundamental than even public safety may be at stake. There are signs that the legal order itself is breaking down in urban areas. “There’s a total lack of respect out there for the police,” says a female sergeant in New York. “The perps feel more empowered to carry guns because they know that we are running scared.”

The lawful use of police power is being met by hostility and violence, often ignored by the press. In Cincinnati, a small riot broke out in late July when the police arrived at a drive-by shooting scene, where a 4-year-old girl had been shot in the head and critically injured. Bystanders loudly cursed at officers who had started arresting suspects at the scene on outstanding warrants, according to a witness I spoke with.