In speaking to Congress on Thursday, Pope Francis demonstrated that he’d brushed up on his American history in advance of his historic visit to the U.S. In mentioning a few famous Americans whose lives could serve as inspirations as the world navigates current crises, he turned to two obvious choices—Abraham Lincoln and Martin Luther King—and two whose names might be unfamiliar to those less versed in the history of American religion: Dorothy Day and Thomas Merton.
So who were they?
Dorothy Day was the founder of the Catholic Worker Movement, who used her faith to work for social justice. In 1940, TIME noted that, “Among U. S. Christians who care for the poor, none are more blessed with selfless zeal than those Roman Catholics who labor in the Catholic Worker movement.”
When she died in 1980, TIME explained that her take on Catholic activism was anything but uncontroversial:
To admirers like Historian David J. O’Brien, writing in Commonweal, she was “the most significant, interesting and influential person in the history of American Catholicism.” If so, it is because her Catholic Worker movement blended zeal for reforming the whole social system with practical concern for helping the individual poor. She was arrested a dozen times, the first as a suffragette in 1917, the last during a workers’ demonstration in California in 1973, and took part in scores of labor and antimilitary protests.
Though she was raised Episcopalian and became an agnostic in her youth, as she “took a Marxist lover, joined the young labor movement and wrote for far-left newspapers like the Masses,” a relationship and the birth of her daughter led to the church. In the 1930s, in the depths of the Depression, she launched the periodical TheCatholic Worker and a philosophy to go along with it: pro-union, anti-poverty, pacifist, anti-government. She even went so far as to refer to it as anarchism, believing that individuals could be empowered to do good on their own.
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Pope Francis sits on board his Rome-bound plane after his visit to the U.S. in Philadelphia, on Sept. 27, 2015.Charles Mostoller—ReutersA man looks at a television screen showing Pope Francis as he celebrates the Festival of Families Sunday mass in Philadelphia on Sept. 27, 2015.Carlos Barria—ReutersA man holds a child as Pope Francis celebrates mass in Philadelphia on Sept. 27, 2015.Matt Slocum—APPope Francis conducts the final mass of his U.S. visit in Philadelphia, on Sept. 27, 2015.Mark Makela—ReutersPeople without tickets watch on video screens as Pope Francis celebrates mass in Philadelphia on Sept. 27, 2015.Jonathan Ernst—ReutersPope Francis waves to the crowd from the pope mobile during a parade along the Benjamin Franklin Parkway before Mass in Philadelphia on Sept. 27, 2015.Michael Perez—APCrowds wait to go through security checkpoint before entering the Benjamin Franklin Parkway for the Papal Mass on Sept. 27, 2015, in Philadelphia.Michael Perez—APA family from Trenton, N.J., originally from Ecuador, walk over the Benjamin Franklin Bridge ahead of a Sunday Mass to be delivered by Pope Francis in Philadelphia, on Sept. 27, 2015.Julio Cortez—APPope Francis waves to the crowd during a parade in Philadelphia, on Sept. 26, 2015.Matt Rourke—APPope Francis takes the stage during the Festival of Families in Philadelphia, on Sept. 26, 2015.Matt Slocum—APPeople pray and watch as Pope Francis celebrates mass at the Cathedral Basilica of Saints Peter and Paul in Philadelphia, on Sept. 26, 2015. James Robinson—APThe wind lifts Pope Francis' mantle as he delivers his speech in front of Independence Hall in Philadelphia, on Sept. 26, 2015.Tony Gentile—APPope Francis is greeted by seminarians as he arrives at St. Charles Borromeo Seminary, on Sept. 26, 2015, in Wynnewood, Pa.Mel Evans—APNuns wait for Pope Francis' arrival at the Festival of Families rally along Benjamin Franklin Parkway in Philadelphia, on Sept. 26, 2015.Carlos Barria—ReutersPope Francis kisses and blesses Michael Keating, 10, of Elverson, Pa after arriving in Philadelphia and exiting his car when he saw the boy, Saturday, Sept. 26, 2015, at Philadelphia International Airport.Joseph Gidjunis—World Meeting of Families/APPope Francis reads his homily while celebrating high Mass at Madison Square Garden, on Sept. 25, 2015 in New York City.Julie Jacobson—APA crucifix hangs above member of the clergy who watch as Pope Francis, not shown, celebrates Mass at Madison Square Garden, on Sept. 25, 2015 in New York City.Michael Appleton—APThousands of people watch Pope Francis ride in the popemobile through Central Park on Sept. 25, 2015 in New York City.Justin Sullivan—Getty ImagesPope Francis arrives in his car for a visit to Our Lady Queen of Angels School in the Harlem neighborhood of New York, on Sept. 25, 2015.Eric Thayer—APSecurity personnel watch from the back of a vehicle as Pope Francis tours Our Lady Queen of Angels School in East Harlem in New York City, on Sept. 25, 2015. Brendan McDermid—ReutersPope Francis and Cardinal Timothy Dolan, left, pray at the South Pool of the 9/11 Memorial in downtown Manhattan, on Sept. 25, 2015. John Minchillo—APPope Francis is seen on a video monitor as he signs the United Nations guest book before addressing the General Assembly at United Nations headquarters in New York City, on Sept. 25, 2015.Mary Altaffer—APPope Francis makes his way down 5th Avenue in New York City to St. Patrick's Cathedral in New York City on Sept. 24, 2015.Damon Winter—AFP/Getty ImagesPeople in the crowds outside of St. Patrick's Cathedral take pictures in New York City, on Sept. 24, 2015.Damon Winter—The New York Times/ReutersA New York City police officer searches nuns outside St. Patrick's Cathedral prior to the arrival of Pope Francis in New York, on Sept. 24, 2015.Damon Winter—AP/The New York TimesPope Francis reaches out to 5th grader Omodele Ojo of East New York, Brooklyn as he is greeted as he arrives at John F. Kennedy International Airport on Sept. 24, 2015, in New York.Craig Ruttle—AFP/Getty ImagesPope Francis waves to supporters as he arrives at John F. Kennedy International Airport in New York, on Sept. 24, 2015.Craig Ruttle—AFP/Getty ImagesPope Francis waves to the crowd from the Speakers Balcony at the U.S. Capitol in Washington, on Sept. 24, 2015.Doug Mills—Getty ImagesPope Francis pauses in front of a sculpture of Spanish-born Junipero Serra, the Franciscan Friar known for starting missions in California, in Statuary Hall at the U.S. Capitol in Washington, on Sept. 24, 2015Michael Reynolds—Getty ImagesPope Francis addresses a joint meeting of Congress on Capitol Hill in Washington, on Sept. 24, 2015.Evan Vucci—APPope Francis listens to applause before addressing a joint meeting of Congress on Capitol Hill in Washington, on Sept. 24, 2015, Alessandra Tarantino—APPope Francis and Speaker of the House John Boehner speak in the US Capitol building as the Pope arrives to deliver his speech to a joint meeting of Congress in Washington, on Sept. 24, 2015. Bill Clark—EPAPope Francis performs Mass at the Basilica of the National Shrine of the Immaculate Conception in Washington, on Sept. 23, 2015.Vincenzo Pinto—AFP/Getty ImagesPope Francis greets and blesses seminarians, novices, religious guests inside the Basilica of the National Shrine of the Immaculate Conception in Washington, on Sept. 23, 2015. Jim Bourg—ReutersPope Francis arrives for the canonization Mass for Junipero Serra at the Basilica of the National Shrine of the Immaculate Conception in Washington, on Sept. 23, 2015.Rob Carr—Getty ImagesSt. Mathews Cathedral is reflected in a nearby building as onlookers wait for Pope Francis to arrive for midday prayer service at St. Matthew’s Cathedral in Washington, on Sept. 23, 2015. Jose Luis Magana—APPope Francis waves to the crowd from the popemobile during a parade along Constitution Avenue in Washington, on Sept. 23, 2015.Alex Brandon—APPope Francis waves to the crowd from the popemobile during a parade in Washington, on Sept. 23, 2015.Alex Brandon—APPresident Barack Obama talks with Pope Francis in the Oval Office of the White House in Washington, on Sept. 23, 2015. Tony Gentile—APPresident Barack Obama and Pope Francis walk down the Colonnade before meeting in the Oval Office of the White House in Washington, on Sept. 23, 2015. Andrew Harnik—APFirst Lady Michelle Obama, President Barack Obama, and Pope Francis wave during an arrival ceremony at the White House in Washington, on Sept. 23, 2015.Vincenzo Pinto—AFP/Getty ImagesGuests watch as President Barack Obama greets Pope Francis during an arrival ceremony on the South Lawn of the White House in Washington, on Sept. 23, 2015. Mandel Ngan—AFP/Getty ImagesPope Francis speaks alongside President Barack Obama during an arrival ceremony on the South Lawn of the White House in Washington, on Sept. 23, 2015. Mandel Ngan—AFP/Getty ImagesPresident Barack Obama welcomes Pope Francis during an arrival ceremony at the White House in Washington, on Sept. 23, 2015.Win McNamee—Getty ImagesPresident Barack Obama and first lady Michelle Obama accompany Pope Francis to the stage during a state arrival ceremony, on Sept. 23, 2015, on the South Lawn of the White House in Washington. Andrew Harnik—APPeople wait for the arrival of Pope Francis at the White House in Washington, on Sept. 23, 2015.Vincenzo Pinto—AFP/Getty ImagesPope Francis takereceives a kiss, outside the Apostolic Nunciature to the United States in Washington, on Sept. 23, 2015 .Molly Riley—AFP/Getty ImagesA man holds up a Papal flag as he waits for Pope Francis departure from the Apostolic Nunciature, the Vatican's diplomatic mission in Washington, on Sept. 23, 2015. Cliff Owen—APPope Francis waves from a Fiat 500 as his motorcade departs from Andrews Air Force Base, Md., on Sept. 22, 2015.Andrew Harnik—APA crowd of supporters cheer as they attend the arrival of Pope Francis at Joint Base Andrews outside Washington, on Sept. 22, 2015.Kevin Lamarque—ReutersPope Francis is greeted by President Barack Obama, the First Family and children after arriving at Joint Base Andrews, Md, on Sept. 22, 2015. Michael Reynolds—EPAPresident Barack Obama welcomes Pope Francis to the United States as the Pontiff greets dignitaries upon his arrival at Joint Base Andrews outside Washington, on Sept. 22, 2015.Kevin Larmarque—ReutersPresident Barack Obama, first lady Michelle Obama, and others, greet Pope Francis upon his arrival at Andrews Air Force Base, Md., on Sept. 22, 2015. Andrew Harnik—APPope Francis steps off his plane at Andrews Air Force Base in Md., on Sept. 22, 2015.Mandel Ngan—AFP/Getty ImagesPope Francis arrives at Andrews Air Force Base in Md., on Sept. 22, 2015.Mandel Ngan—AFP/Getty ImagesClergy brace for the wind as they stand along the red carpet on the tarmac at Andrews Air Force Base, Md., on Sept. 22, 2015, as the plane carrying Pope Francis arrives.Andrew Harnik—APUS Air Force honor guard unroll the red carpet before Pope Francis arrives at Andrews Air Force Base in Md, on Sept. 22, 2015.Mandel Ngan—AFP/Getty ImagesPope Francis arrives to the United States from Cuba at Joint Base Andrews, Md., on Sept. 22, 2015.Chip Somodevilla—Getty Images
Merton, who came from a similarly non-Catholic background, became a Trappist monk and best-selling author who encouraged peace. As his 1968 TIME obituary made clear, his focus was parallel to Day’s—he “found in the Word a command to do”—but it was through writing that he shared his philosophy with the world:
For 20 years Merton had been the most publicly visible Christian contemplative since St. Simeon Stylites took refuge on top of a pillar. Merton’s pillar was print, and he had not exactly chosen it for himself. What he had chosen, at the age of 26 and as a new convert to Roman Catholicism, was the silent and anonymous life of the Trappist monks, who rise early, work hard, eat little and pray much. When he entered the Abbey of Our Lady of Gethsemani in Kentucky, however, his abbot decreed that Merton should continue writing—as he had since the age of ten. Merton was ordained a priest in 1949, the year after his first major book, The Seven Storey Mountain, had become a bestseller and thrust him permanently into a life of books, articles, poems and a massive correspondence with friends all over the world.
When The Seven Storey Mountain was first published, TIME called it a “perceptive, quietly stirring” reminder that “the most mystical human beings are often among the most practical as well.”
While Day’s activism was very much tied to the 1930s moment in which she got her start, with its focus on workers and soup kitchens, Merton’s fit perfectly with the post-World War II world in which his autobiographical debut was published. Though Merton lived the life of a near-hermit for many years, he became fascinated by Zen Buddhism and Tibetan monastic practices right about when the Beatles did too, and he participated in protests against the Vietnam War.
Though their lives took very different paths, Day’s and Merton’s callings overlapped significantly, with a concentration on anti-poverty and pro-peace activism. In light of that parallel, one they share with another famous Catholic, it’s no wonder Pope Francis would have mentioned their names—even if they’re less famous than Lincoln and King.
Read Day’s full 1980 obituary, here in the TIME Vault: Street Saint
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