Robert P. “Bob” Moses, a civil rights activist who was shot at and endured beatings and jail while leading Black voter registration drives in the South during the 1960s and later helped improve minority education in math, died Sunday, July 25, 2021.

He was 86.

Mr. Moses worked to dismantle segregation as the Mississippi field director of the Student Nonviolent Coordinating Committee, or SNCC, during the Civil Rights Movement and was central to the 1964 “Freedom Summer” in which hundreds of students traveled to the South to register voters.

Mr. Moses started his “second chapter in civil rights work” by founding in 1982 the Algebra Project, thanks to a MacArthur Fellowship. The project included a curriculum Mr. Moses developed to help struggling students succeed in math.

Ben Moynihan, director of operations for the Algebra Project, said Mr. Moses’ wife, Dr. Janet Moses, told him her husband died in Hollywood, Fla. Information was not given as to the cause of death.

“Bob Moses was a hero of mine. His quiet confidence helped shape the Civil Rights Movement, and he inspired generations of young people looking to make a difference,” said former President Obama on Twitter.

Mr. Moses is the latest African-American leader of that era to die in the past year, including Rep. John Lewis, Vernon Jordan, the Rev. C.T. Vivian, Charles Evers and Gloria Richardson.

“He was a strategist at the core of the voting rights movement and beyond. He was a giant,” Derrick Johnson, president of the national NAACP, wrote on Twitter.

Mr. Moses was born in Harlem, N.Y., on Jan. 23, 1935, two months after a race riot left three dead and injured 60 in the neighborhood. His grandfather, William Henry Moses, had been a prominent Southern Baptist preacher and a supporter of Marcus Garvey, a Black nationalist leader at the turn of the century.

Like many Black families, the Moses family moved North from the South during the Great Migration. Once in Harlem, his family sold milk from a Black-owned cooperative to help supplement the household income, according to “Robert Parris Moses: A Life in Civil Rights and Leadership at the Grassroots,” by Laura Visser-Maessen.

Mr. Moses didn’t spend much time in the Deep South until he went on a recruiting trip in 1960 to “see the movement for myself.” He sought out Dr. Martin Luther King Jr.’s Southern Christian Leadership Conference in Atlanta but found little activity in the office and soon turned his attention to SNCC.

“I was taught about the denial of the right to vote behind the Iron Curtain in Europe,” Mr. Moses later said. “I never knew that there was (the) denial of the right to vote behind a Cotton Curtain here in the United States.”

The young civil rights advocate tried to register Black people to vote in Mississippi’s rural Amite County where he was beaten and arrested. When he tried to file charges against a white assailant, an all-white jury acquitted the man and a judge provided protection to Mr. Moses to the county line so he could leave.

In 1963, he and two other activists, James Travis and Randolph Blackwell, were driving in Greenwood, Miss., when someone opened fire on them and the 20-year-old Mr. Travis was hit. In a press release from SNCC, Mr. Moses described how bullets whizzed around them and how he took the wheel when Mr. Travis was struck and stopped the car.

“We all were within inches of being killed,” Mr. Moses said in the 1963 press release.

A recurring theme in Mr. Moses’ life and work was the need to listen and work with the local populations where activists were trying to effect change, whether that was registering Black voters in some of the most staunchly anti-integration parts of Mississippi or years later working with students and teachers to come up with ways to improve math knowledge.

In an interview with the National Visionary Leadership Project, he talked about the need for civil rights workers to earn the trust of the local population in Mississippi.

“You had to earn the right for the Black population in Mississippi to decide that they were going to work with you because why should they risk everything to work with you if you were somebody or a collection of people who were just not serious?” he said.

He later helped organize the Mississippi Freedom Democratic Party, which sought to challenge the all-white Democratic delegation from Mississippi to the 1964 Democratic National Convention. But President Lyndon B. Johnson prevented the group of rebel Democrats from voting in the convention and instead let Jim Crow southerners remain, drawing national attention.

Disillusioned with white liberal reaction to the Civil Rights Movement, Mr. Moses soon began taking part in demonstrations against the Vietnam War, then cut off all relationships with white people, even former SNCC members.

Mr. Moses moved to Canada to avoid the military draft in 1967, then worked as a teacher in Tanzania, Africa, for several years. He returned to Harvard University to earn a doctorate in philosophy and taught high school math in Cambridge, Mass. He later taught math in Jackson, Miss., while commuting back and forth to Massachusetts on the weekends.

The press-shy Mr. Moses started his “second chapter in civil rights work” by founding in 1982 the Algebra Project using money he received through the MacArthur Foundation Fellows program — often referred to as “genius” grants — to improve math literacy among underserved populations. Mr. Moynihan of the Algebra Project said Mr. Moses saw the work of improving mathematics literacy as an extension of the civil rights work he had started in the 1960s.

“Bob really saw the issue of giving hope to young people through access to mathematics literacy ... as a citizenship issue, as critical as the right to vote has been,” Mr. Moynihan said.

Ernesto Cortés Jr., director emeritus and senior adviser to the Industrial Areas Foundation that helps develop community organizers, worked with Mr. Moses over four decades during which Mr. Moses would come to seminars and trainings.

Mr. Cortés said Mr. Moses did not talk fast and was very attentive and deliberate. One of the key lessons Mr. Moses imparted was his “steadfastness” — sticking to a goal despite being repeatedly knocked down — and his generosity.

“Bob always looked to develop other people and give them recognition and give them their due,” Mr. Cortés said.