Many experts have found evidence of a strong correlation between tolerance and prosperity, particularly in high-tech sectors. One of them, the author Richard Florida, has identified the “three T’s” — talent, technology and tolerance — as the fundamental basis for the growth of new economies.

With a high concentration of outstanding colleges and universities, Rhode Island certainly has the talent. The technology is there as well, with our state’s broadband speed and coverage ranked among the nation’s best. The Beacon Hill Institute’s most recent State Competitiveness Report also placed Rhode Island fifth among all states in the technology category. Now we are poised to adopt the third and final T: tolerance.

The point is not simply that we are welcoming to gay people, though we are. It is that we want to welcome everyone. The talented workers who are driving the new economy — young, educated and forward-looking — want to live in a place that reflects their values. They want diversity, not simply out of a sense of justice, but because diversity makes life more fun. Why would any state turn away the people who are most likely to create the economies of the 21st century?

I have been heartened in recent months to see members of my old party coming around on marriage equality, including the entire Republican caucus in the Rhode Island Senate — the first time a caucus of either party has been unanimous in its support. That reflects sound political judgment, and some values that are at least as Republican as they are Democratic, including a belief in marriage as an institution and a desire to keep government out of our personal lives.

The push for equality will continue to grow stronger in statehouses, courthouses and polling places in every state in America. This is, by and large, a generational issue, not a geographic one. Even in the reddest states, the rising generations are far more tolerant than their parents and grandparents. As this shift continues, marriage equality will inevitably become law in more and more states. The states that cling to their old prohibitions will then be viewed as the outliers. Like Rhode Island in recent years, they will be seen as islands of old thinking.

This is also true, more broadly, at the national level. The United States is at a competitive disadvantage in attracting skilled workers to fill high-level jobs in technology, finance and health care, as noted by industry leaders and Wall Street executives at Monday’s annual “Out on the Street” conference. It is my hope that the Supreme Court will choose to overturn the Defense of Marriage Act, and that my fellow governors will lobby their Congressional delegations to address our country’s discriminatory policies at the federal level.

So tomorrow, when I sign the Marriage Equality Act into law, I will be thinking of the Rhode Islanders who have fought for decades simply to be able to marry the person they love. I will be thinking of how Rhode Island is upholding its legacy as a place founded on the principles of tolerance and diversity. But I will also be thinking, as all governors must, about the economy. With marriage equality becoming law tomorrow night in Rhode Island, we are sending a clear message that we are open for business, and that all are welcome. I hope that leaders in capitals across the country — including Washington — will soon realize that marriage equality is an issue where doing the right thing and the smart thing are one and the same.