Computers and cyborgs aren’t about to render the American worker obsolete. But they’re tilting the nation’s economy more and more in favor of the rich and away from the poor and the middle class, new economic research contends.

Despite rising fears of technology displacing huge swaths of the workforce, there remain huge classes of jobs that robots (and low-wage foreign workers) still can’t replace in the United States, and won’t replace any time soon. To land the best of those jobs, workers need sophisticated vocabularies, advanced problem-solving abilities and other high-value skills that the U.S. economy does a good job of bestowing on young people from wealthy families — but can’t seem to deliver to poor and middle-class kids.

That is the alternatively optimistic and bleak picture of the domestic labor market sketched by economists Frank Levy of MIT and Richard J. Murnane of Harvard, who conducted a detailed study of what jobs have been lost to automation in recent years and which jobs are likely to be lost as technology keeps advancing. They wrapped their findings into a new paper for the centrist Democratic think tank Third Way, in which they argue, “For the foreseeable future, the challenge of ‘cybernation’ is not mass unemployment but the need to educate many more young people for the jobs computers cannot do.”

It’s a challenge other countries are solving better than America, Levy and Murnane say. It’s one that U.S. policymakers will need to solve if they hope to keep their global economic edge and to keep lower-income Americans from falling further behind.

“We’ve been fearing this technological change since LBJ,” said Jim Kessler, Third Way’s senior vice president for policy. Murnane and Levy, he added, “are saying, ‘Look, understand what these technological changes are. There are things we do better, there are things the machines do better. Know that, and we can prepare ourselves for it.’ ”

Experts have warned for decades that technological advancements could eventually muscle people out of the workforce; in 1964, a group of high-profile scientists and economists called the Ad Hoc Committee on the Triple Revolution told President Lyndon Johnson that computers would soon create a massive unemployment problem, Kessler noted.

More recently, MIT professors Erik Brynjolfsson and Andrew McAfee penned an e-book, “Race Against the Machine,” blaming automation for the sluggish job growth of the last decade-plus. They predict worse employment effects to come. The professors cite the recent — and historically anomalous — “decoupling” of productivity and growth in the United States: The economy is producing more per worker, but that extra efficiency isn’t translating into a corresponding rate of hiring.

“Race Against the Machine” argues that all sorts of jobs people once imagined could never be done by robots are on the cusp of automation. The authors cite truck drivers, whose jobs are threatened by the advent of Google’s driverless car.

Levy and Murnane don’t think such breakthroughs in artificial intelligence are anywhere close to at hand, based on extensive conversations with AI experts at MIT. (They’ve convened several lunches with those experts; Brynjolfsson and McAfee have attended some of them.) They’re not convinced driverless cars will replace truckers — computers still have a “common-sense” problem, Levy and Murnane say: A driverless 18-wheeler won’t hit the brakes preemptively if a ball bounces into the street because it wouldn’t know a small child might likely chase after it.

The more optimistic view holds that computers will continue to struggle, for a long time, with several types of tasks — and in those tasks lie America’s employment future.

Levy and Murnane looked back over 50 years of employment in the United States and sorted jobs into five broad categories: routine manual tasks, routine cognitive tasks, non-routine manual tasks, working with new information and solving unstructured problems. In the past 20 years, almost all the net job gains were in the two areas computers struggle with the most: working with new info (for example, figuring out a customer’s Internet service issues) and solving unstructured problems (such as repairing cars when computer diagnostics can’t pinpoint what’s wrong).

Put another way, computers have grown very good at doing things that require plugging in formulas or simply following directions. Humans are still much better at talking to one another to figure out where problems lie and strategize how to solve them.

There are still a lot of jobs in the economy that require those human skills. But wealthy kids have a huge advantage in getting those jobs, thanks to their schooling — Pew research shows the lowest-achieving wealthy child is more likely to finish college than the highest-achieving poor child — and, maybe more importantly, their home environments.

“With the constant need to acquire and work with new information,” Levy and Murnane write, “literacy requires not only the ability to sound out words phonetically, but also the background knowledge and vocabulary to make sense of newly encountered words and concepts.” On this, studies show wealthier children have a big edge, hearing their parents speak nearly four times as many words in their infancy than the children of welfare recipients do. More affluent parents send their children to preschool and science camp and all sorts of other enrichment activities that supplement their basic educations.

When it comes to the skills most prized in the future job market, Murnane said in an interview, “kids from affluent families get a lot of that at home, and poor kids don’t.”

Educators and policymakers will need to find ways to fill that gap, the economists say, or they risk exacerbating America’s already wide — and damaging — economic inequality. They say countries such as Denmark, Norway and the United Kingdom are meeting the challenge more effectively, as evidenced by their lower income-inequality ratios and higher degrees of economic mobility.

Other economists say the policy problem goes well beyond education. Many liberal labor economists, for example, contend that decreased worker bargaining power over the past decades explains the inequality trends more than educational failures.

Bridging the educational divide, to help lower-income students succeed in the robot-proof workforce, is a huge undertaking, Murnane and Levy concede. Murnane called it a decades-long challenge — but one that, ironically, could gain urgency among policymakers if the pace of technological advancement accelerates and more people find their jobs jeopardized by automation.

“One of the things that operates right now is there are a chunk of people who are doing just fine, because they’re not threatened by technology,” Murnane said. “Once you see more and more people threatened, that really changes the political calculation.”