On 31 May, at a high school ceremony in Massachusetts, Chris Anne Affleck watched her grandson Atticus cross the stage. She had been diagnosed with pancreatic cancer the previous December and given roughly six months to live. Her final wish, the family later said, was to witness this graduation. She managed it, surrounded by her sons Ben and Casey and their children. Two days later, on 2 June, she died peacefully in her sleep.

The death was not announced publicly for seven weeks. A brief obituary appeared in The Boston Globe on a Thursday in late July, signalling a family instinct to protect private sorrow from the mechanics of celebrity news. The delay was neither secretive nor evasive; it matched a pattern of guardedness that has long defined the Afflecks. What the obituary disclosed, however, was a life of quiet substance. Chris Anne Affleck, born Christopher Anne Boldt in New York in 1942, graduated from Radcliffe College, then spent 35 years as a public-school teacher. In 1964 she joined the Freedom Summer, journeying to Mississippi to teach literacy to disenfranchised black citizens. She protested the Vietnam War, volunteered for Obama’s presidential campaign, and later worked on water-justice campaigns in Palestine and sustainability projects on Cape Cod. The arc of her activism was consistent and unspectacular—the kind of commitment that thrives far from cameras.

When her marriage to Timothy Byers Affleck ended, she raised Ben and Casey in Cambridge, Massachusetts, on a teacher’s salary, nurturing their interest in the arts. It was through her friendship with Boston casting director Patty Collins that Ben, as a child, got his first roles. That connection, he said later, was “almost a joke” that led to a career. Years afterward, she would appear at his side during the 1998 Academy Awards, when Ben, then 25, and Matt Damon won best original screenplay for Good Will Hunting. Seated next to their mothers, the two young men embraced them as the cameras flashed. Ben recalled, “There was nobody else who was going to go. Of course our mothers were going to go. It was something totally innocent and sincere.”

The obituary noted that she delighted when her children and grandchildren “questioned, challenged or faced authority with wit.” That irreverence, she believed, was something to be encouraged. In her final days, having seen Atticus graduate, she returned home and let go. She leaves behind her two sons and five grandchildren, among them the teenager whose diploma became her last milestone. In a city that routinely burnishes fame, her story suggests that a teacher’s steady presence can be the quiet scaffold on which Oscar-winning careers are built.