Geographic mobility has always played a big part in the “American dream.” For my part, I have moved between states or countries 10 times. But you don’t have to share my apparent wanderlust to realize that picking up and moving can inflect a person’s life for the better. Especially in a hyper-competitive economy, we would intuitively expect people to be moving more and more to seize opportunities and find the best occupational fits.

I recently got curious about this topic and whether reality matched my expectations. I spent an afternoon digging into some migration data from the Census Bureau. And what I found surprised me: People today are actually moving less often than the historical norm.

Much less.

The data are astonishing. In the 1960s, roughly 20 percent of the US population moved in any given year. Since then, that fraction has been cut almost in half. Looking at the numbers another way: While the U.S. population has increased by more than 75 percent since 1960, the total number of people who move annually is roughly the same.

Curiously, those who would seem most compelled to move appear to be especially stuck. Look at Mississippi, which has one of the nation’s highest unemployment rates. One might expect to see outmigration to places such as North Dakota, where unemployment is about half as high. Yet Mississippians today are even less likely to move out of state than they were before the Great Recession.

Why the decline?

Reading through the possible explanations, one popular hypothesis was that our aging population explains a lot of this decline. Younger adults have always moved more relative to older people, and so a population in which they make up a declining share would be expected to be less mobile on average.

This is part of the story, but it doesn’t capture everything that’s going on. For example, it turns out mobility has dropped over time for all ages. In fact, since the onset of the Great Recession, the decline in mobility has actually been the most dramatic among millennials. Other factors must also be contributing. Chief suspects include a more broadly stagnant economy, a housing crisis that left many anchored to homes while they wait for values to rebound, and — especially interesting to me — a regrettable cultural shift that undersells the importance of entrepreneurial living.

Let’s talk solutions. First, we could reform our education system to better equip people with valuable skills that transcend particular organizations and localities. Reviving vocational and technical training programs via creative voucher schemes would be a good start.

Second, we can make moving easier. First and foremost, we should fine-tune welfare programs, many of which have policy quirks that can dissuade the vulnerable from relocating or from seeking employment at all. We could also experiment with small-scale programs in which the government offers relocation allowances or collects information about employment opportunities in other regions, and then rigorously assess their effectiveness.

But more than any policy tweak, we must set out to rebuild a culture that prizes dynamism and treating life as an entrepreneurial project. That starts with leaders who testify proudly to the true pillars of the American dream — courage, adventure, optimism, and a unique refusal to be tied down to our pasts.

When Alexis de Tocqueville came to our shores in the early 1800s, he didn’t find leaders who stoked — and sought to profit from — the masses’ fears of change. In fact, he found quite the opposite, noting that the American people embraced instability and churn as a source of wonder and self-improvement. Today, that sense of adventure is eroding and trepidation is taking its place.

Telling Americans they should be afraid or angry about our changing economy is exactly the wrong answer. The only acceptable response is to fight proudly and boldly for solutions. And I’m convinced that one of those solutions is to help people get out of Dodge.

This section is adapted from my latest New York Times piece.