For many entrepreneurs, it isn’t enough to only solve one problem — they want to change the world. And when launching a business, a social mission embedded in the company’s DNA can be a selling point for customers, investors and prospective employees.

But it’s one thing to just state your mission, and another to be able to realize it. To that end, a recent study from Halcyon Incubator and Capital One identified some key factors that help socially-minded business owners succeed.

Related: When Should Entrepreneurs Pursue a Social Good?

The researchers found the there are four integral pieces needed to create a social enterprise with longevity: access to all types of funding, a high quality of life in the location where the business is based, a government regulatory system that is helpful and receptive to the idea and a strong bench of employees, mentors and advisors.

In surveying 388 social entrepreneurs around the country, Washington, D.C. is ranked as the number-one U.S. city for social enterprise, followed by San Francisco, Austin, Texas, Boston and Seattle.

Related: Social Entrepreneurship Has Unexpected Benefits for the Bottom Line

Forty-seven percent of the participants said that they selected a city to start their business because they were already living there. But the researchers also found a link between the quality of life of the locale and the caliber of employee and mentors available, noting that areas that were home to a lot of universities — such as northern California and the Boston area — often met both of those criteria.