A few years ago, the documentary “My Tale of Two Cities” was released.

The film focused on the revival of Pittsburgh, which hit the skids in a serious way when the steel industry collapsed.

At its heart, the documentary is a love story that chronicles the passion that so many people have for the “Steel City.” But it was also a reminder that emotion plays a huge role in economic development. If people are excited about their community, you can feel it in the air; and that vibe attracts others who want to be a part of things.

Dreams can be contagious, but they only take root if you care enough about your community to dream about it.

If you love a place, your heart soars when it succeeds and it aches when it falls on hard times.

As bad as things got in Pittsburgh, conditions were even worse in Detroit. But a group of passionate people are working wonders to bring that great American city back from the brink just as Pittsburgh has reinvented itself around medicine, education and robotics.

The “Made in Detroit” movement, the amazing efforts of Quicken Loans founder Dan Gilbert to revive the downtown and the work of artists and entrepreneurs to breathe new life into derelict buildings is nothing short of an act of love.

And of faith.

People love Detroit too much to let it go. So it will come back, maybe not the same as it was, but strong nonetheless.

Yes, emotion plays a huge role in economic development and community building.

Leaders who “get it” try to encourage that love because they know when passion is applied mountains can be moved. When you love something you commit to it, whether it’s a business, a business district, a community garden, a cause, a street, a cultural center or a neighborhood.

We have seen it happen in Delray Beach and in Boca Raton.

I remember when entire sections of Delray were open air drug markets. I remember when you could bowl down Atlantic Avenue at 5 p.m. and not hit anything. Then it changed—it changed the moment people committed to taking back their neighborhoods and rebuilding their downtown. To be sure, physical change can take years, but when the emotional switch is flipped, the energy of a city changes. You’re building…you’re working together…you’re making things happen. It’s electric. And it’s essential.

In Boca, I remember the old mall, the one on US 1 back before they built Mizner Park. It was depressing. It seemed like the all the growth and investment were sprawling west to places beyond 441. But today, east Boca is alive.

The most valuable assets cities have can’t be measured and that’s leadership, love and a sense of community.

If you have those you will see rapid progress, you will be able to handle adversity and you will seize opportunity. If you’re lacking, you’re doomed.

If you can’t find leaders who can build community and inspire people to fall in love, you’re going to struggle and you are going to drift. Sorry, that’s the law. There’s no skirting it.

But, if you do find those special leaders then look out, because now anything and everything possible.

Once a group of people starts believing and dreaming and converting others to their cause, social movements take root and transformational change is not only possible it’s inevitable.

It often starts with a monomaniac on a mission; someone so passionate that you can’t help but buy into their vision.

In Delray, there was Nancy Hurd who believed in helping the poorest, most at-risk children in our community. From that kernel grew the Achievement Center.

There was Frances Bourque, who thought an old broken down old school in a very strategic location could become a cultural beacon and community gathering space. She was right and we have Old School Square as a result when some of the powers that be at the time wanted to level the school and build something else.

There was Rick Overman, who came from Orlando and envisioned a police department that would be devoted to building neighborhoods and making our city safe for investment and a better quality of life. Within a year or two, he changed the culture of the department, enlisted over 1,000 (yes that’s correct) volunteers and not only transformed the department but the city itself.

We had Libby Wesley, who launched the Roots Cultural Festival, because she wanted to showcase the talents of children in the northwest and southwest neighborhoods and there was Norman Radin, who believed a derelict section north of Atlantic Avenue could be a cool place named Pineapple Grove. People thought Norman was nuts—Pineapple Grove was marred by vacant lots and vagrants.

The highlight of the street was a tire store and an old  McCrory’s department store. But Norman believed and before long so did others.

Spencer Pompey sought to integrate the public beach in Delray and drew national attention to his efforts. Mr. Pompey and his wife Ruth were dedicated to civil rights and deeply influenced a generation of leaders.

Vera Farrington wanted to preserve the history of the African American community and started a museum in the former home of a legendary black educator named Solomon Spady.

The list goes on…and Boca has had its share of visionaries too.

According to the Palm Beach County History Museum: “Tom Crocker worked with Boca Raton’s Community Development Agency to replace the failed Boca Raton Mall with a 28.7-acre mixed-use project, Mizner Park, completed in phases throughout the 1990s. Today the center includes 272 homes, a public promenade and park, stores and restaurants, 262,000 square feet of office space, a movie theater, the Count de Hoernle Amphitheater, the Centre for the Arts, and the Boca Raton Museum of Art.”

Prior to the creation of Mizner Park, there were 73 housing units downtown and office rents were the lowest in Palm Beach County.

With voter approval, the City of Boca Raton spent $50 million in infrastructure improvements and $68 million in bond financing to make the project feasible.

It wasn’t easy…controversies resulted in new state laws, a restructuring of the city’s government, higher local taxes, lawsuits, and heavy city debt.

But Mizner Park fulfilled its promise as a stimulant for downtown redevelopment. By 2002, there were 689 housing units downtown and 900 more under construction, and office rents were the highest in South Florida. The resulting 14-fold increase in assessed property values from 1990 to 2002 improved the city’s tax base, although the timing initially proved to be poor economically.

After property values rose again in 2005 Mizner Park started paying for itself. The U.S. Environmental Protection Agency recognized Mizner Park for removing a blighted property while creating a dynamic meeting place for the community.

Not bad. Sometimes progress takes a while. Sometimes a vision has to struggle before it takes root.

When a community embraces ideas, appreciates passion, works together on a common vision and understands that there is a difference between investment and spending—you begin to see change.

You begin to see value created before your eyes and that momentum builds additional momentum and encourages others to try and create things.

The best leaders I have observed are those who are creators and builders—people who embrace change, but also protect and promote  values and traditions.

It’s not enough to sit on a dais and judge. We need elected officials who seek to understand and build their communities. We need leaders who understand they have a responsibility to create jobs and opportunity and to position their cities for the future.

It’s not enough to sit on your couch and criticize or complain on social media. We need citizens  to organize around positive change. We need citizens who vote, write letters to the editor, blog, join, give, mentor and volunteer.

And most of all, we need citizens to fall in love.

When they fall head over heels— we’ve seen it and experienced it—change becomes easier to digest. It also becomes easier to shape too.

Passion, positivity and vision attract investment—the best kind too.

When investors show up to fund a community’s vision you can actually celebrate your success. Imagine that, feeling good about progress because it advances the dreams, goals and aspirations of citizens.

I see exhaustion in both Delray and Boca—long meetings, campaigns that are negative and development projects met with derision and dread.

Perhaps, it is because we are lacking a unifying vision and so we find ourselves reactive—liking some things, hating others; fixating on numbers—too tall, too dense but neglecting important things like design, affordability and uses that create a sustainable community.

The end result is always division; not consensus, excitement, pride or unity. We set up a system that has winners and losers and whether we win or lose we are exhausted by the fight. And there’s always a fight.

Debates and disagreements are inevitable. Cities are messy places. But I believe—when you are in service to a citizen driven vision—that those disagreements become fewer and your debates more focused.

Just a thought…but it all comes down to leadership and love of community.