Indeed, the death of manufacturing has been greatly exaggerated.

Industrial employment rose from 11.6 million jobs in January 2011 to 12.5 million in October 2021, and the United States is home to hundreds of manufacturers that deliver world-class products and excellent financial returns. Collectively, these companies make up the “Titanium Economy”–and their performance could be critical to driving the sustainable and inclusive growth our country needs.

The Titanium Economy is hidden in plain sight. Many of these companies are based far from major media markets, and they do important things like manufacturing lifting equipment or re-refining oil. Median annual pay is $63,000, compared to $30,000 for service jobs–and many of these jobs go to those without four-year degrees. 

Many, too, are embedded in the hometowns of their founders and families.

An estimated 688 Titanium Economy companies are public–a fifth of the number of private ones. When they create value, it’s with Main Street, not just Wall Street, in mind. One of the most interesting things that stemmed from a set of nationwide research on these companies was that Titanium Economy hometowns often seem like great places to live.

If this conjures up images of a quaint workshop with a few grizzled workers and muffins on Monday, think again. About 80% of public Titanium Economy companies are small to mid-cap, with sales ranging from $1 billion to $10 billion and a headcount of 2,000 to 20,000 employees. The 380 largest privately-owned Titanium Economy companies have a combined annual revenue of about $250 billion.

One feature of this group is that they excel at innovation-driven organic growth. That is because they are often leading players in “micro-verticals”–clusters of ten to fifteen firms in specialty segments. Because the market is narrow, companies know it, and their customers, intimately.

Take New Port Richey, Florida-based Welbilt, a key player in the $80 billion industrial kitchen equipment market. Welbilt knew that restaurants and other big kitchens spent a ton of time monitoring the temperatures in each of their machines. So, after three years of effort, it created the kind of innovation that doesn’t make headlines outside the trade press: a common controller and user interface that could be used on all Welbilt equipment, improving productivity, reliability, quality, and safety–along with company performance.

All this is interesting in and of itself–but it is more than that: The success of Titanium Economy companies can spread far beyond their own bottom line. Their strength means that they can become hubs for related industries, bringing in talent and investment, which then attracts more companies, and so on: what we call the “Great Amplification Cycle.”

Simpsonville, South Carolina, was thrilled to attract a Michelin plant when its textile industry declined. Then carmakers followed, and then all kinds of adjacent industries, such as warehousing and commercial cleaning.

But Sealed Air was there first. This Titanium Economy company, founded in 1955, is best known for making bubble wrap. Its success has been a mainstay for the community throughout and was living proof for other industrial companies of the potential of Simpsonville. Government played a central role, too, by creating a hospitable business environment and working with high schools, universities, and other institutions to build and refresh the pool of talent. 

There is one problem with America’s Titanium Economy: We need more of it. With freight, insurance, and labor costs rising around the world, there is a strong economic case for more domestic manufacturing. As COVID-19 showed, there are downsides to not being able to meet important needs on our own.

However, Titanium Economy hubs won’t just happen–they need to be nurtured. Across the U.S., leaders in the public and private sectors, and in academia, could be doing far more.

Titanium Economy companies are undervalued–and less than one percent of venture capital goes into industrial technology. Public sector support is limited too, especially when compared to major competitors like China and Germany. Another mindset challenge: the emphasis on four-year college degrees largely undersells the possibility of manufacturing to the people it would serve well.

More can be done–and it should be done with urgency. If properly nurtured, there could be more and more Titanium Economy hubs, potentially creating virtuous circles of innovation and prosperity in every region.

This effort doesn’t need to be heavy-handed. Investors could help themselves by evaluating industrial tech on its merits. Schools could open their students’ eyes to careers in manufacturing and encourage girls to consider these trades. Labor unions can expand apprenticeships. Trade groups could develop nationally recognized, transferable credentials. State and national governments could consider ways to support Industry 4.0, particularly in distressed regions.

The Titanium Economy is a hidden treasure that defies much of the conventional wisdom about U.S. manufacturing. Building on its strengths could foster greater efficiency and resilience and improve competitiveness.

Asutosh Padhi is McKinsey & Company’s North America managing partner and co-author of The Titanium Economy: How Industrial Technology Can Create a Better, Faster, Stronger America.

The opinions expressed in Fortune.com commentary pieces are solely the views of their authors and do not necessarily reflect the opinions and beliefs of Fortune.

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