Alice Rhinelander, center, with her sisters in the courtroom during the annulment trial.

Jamil Abdullah Al-Amin, then known as H. Rap Brown, in 1967. At the time, he was chairman of the Student Nonviolent Coordinating Committee.

Kenneth Walker in 1986. He pushed for ABC News to pay more attention to Nelson Mandela “when he was still in jail and was anything but a hero to millions of people, including the president of the United States,” Ted Koppel, the longtime “Nightline” anchor, said.

Roy Wood Jr. photographed in Manhattan.

In Philadelphia, frustrated campaign organizers for Vice President Kamala Harris gathered in stealth at a Dunkin’ Donuts as they tried to turn out Black and Latino voters on their own.

Dr. Raven Baxter, a molecular biologist, was in escrow on a new home when she was told the seller didn’t want to hand over the keys to a Black person.

Students occupied Columbia’s Hamilton Hall in April 1972.

Coleman Hughes in Queens, N.Y., on Tuesday. Mr. Hughes has emerged as something of a rarity in the tense national conversation over how race should factor into public policy.

Joseph R. Biden Jr. on the campaign trail in South Carolina in 2019. Black voters were critical to his Democratic primary victory in 2020, and to his success against Donald J. Trump in the general election.

Samara Minkin was upset when she saw a social media post by Sanidia Oliver about the Israel-Hamas war. She reached out to ask if she would agree to a face-to-face conversation about their differences.

People listened to speakers during the 60th Anniversary of the March on Washington at the Lincoln Memorial in Washington on Saturday.