Drawing on a new World Bank study, Washington Post columnist Charles Lane today notes “a vast reduction in poverty and income inequality worldwide over the past quarter-century” – despite what you might think if you listen to Pope Francis, Bernie Sanders, and other voices prominent in the media.

Specifically, the world’s Gini coefficient — the most commonly used measure of income distribution — has fallen from 0.69 in 1988 to 0.63 in 2011. (A higher Gini coefficient connotes greater inequality, up to a maximum of 1.0.)

That may seem modest until you consider that the estimate’s author, former World Bank economist Branko Milanovic, thinks we may be witnessing the first period of declining global inequality since the Industrial Revolution.

Note that this hopeful figure applies to the world’s population as though every individual lived in one big country. When Milanovic assessed the distribution of income between nations, adjusted for population, the improvement was even more striking: a decline in the Gini coefficient from 0.60 in 1988 to 0.48 in 2014.

The global middle class expanded, as real income went up between 70 percent and 80 percent for those around the world who were already earning at or near the global median, including some 200 million Chinese, 90 million Indians and 30 million people each in Indonesia, Egypt and Brazil.

Those in the bottom third of the global income distribution registered real income gains between 40 percent and 70 percent, Milanovic reports. The share of the world’s population living on $1.25 or less per day — what the World Bank defines as “absolute poverty” — fell from 44 percent to 23 percent.

So maybe this is a result of all the agitation on behalf of a more moral or planned economy? No, says Lane, citing Milanovic:

Did this historic progress, with its overwhelmingly beneficial consequences for millions of the world’s humblest inhabitants, occur because everyone finally adopted “democratic socialism”? Was it due to a conscious, organized effort to construct a “moral economy” as per Vatican standards?

To the contrary: The big story after 1988 is the collapse of communism and the spread of market institutions, albeit imperfect ones, to India, China and Latin America. This was a process mightily abetted by freer flows of international trade and private capital, which were, in turn, promoted by a bipartisan succession of U.S. presidents and Congresses.

The extension of capitalism fueled economic growth, which Milanovic correctly calls “the most powerful tool for reducing global poverty and inequality.”

This is the good news about the world today. Indeed, it’s the most important news about our world. We hear so much about poverty, inequality, gaps, resource depletion, and the like, it’s a wonder any NPR listeners can bear to get out of bed in the morning. But as the economic historian Deirdre McCloskey says, this is the “Great Fact,” the most important fact about our world today – the enormous and unprecedented growth in living standards that began in the western world around 1700. She calls it “a factor of sixteen”: we moderns consume at least 16 times the food, clothing, housing, and education that our ancestors did in London in the 18th century. And this vast increase in wealth that began in northwestern Europe, mostly Britain and the Netherlands, has now spread to most of Europe, the United States, Japan, and increasingly to the rest of the world.

Bernie Sanders is leaving tonight for the Vatican, where he’ll speak at a conference of the Pontifical Academy of Social Sciences on changes in politics, economics, and culture over the past 25 years. Other speakers will include the leftist presidents of Ecuador and Bolivia. The Vatican would do better to invite Branko Milanovic and Deirdre McCloskey, who have a much better understanding of the real changes in our world than do Sanders, Rafael Correa, and Evo Morales.

Economic growth has not eliminated all poverty, and it will never solve all the problems of the human heart. But understanding the enormous increase in world standards of living over the past three centuries and the past 25 years should be a starting point for any discussion of further progress. Neither the Vatican nor the American media do a good job of informing us about the Great Fact.