The movie “Till” tells the story of how Mamie Till-Mobley (Danielle Deadwyler) channeled grief into fury and helped ignite the civil rights movement. Her 14-year-old Chicago-reared son, Emmett, went south in summer 1955 to visit relatives in Mississippi. There he was brutally murdered after a white shop owner concocted a story about Emmett making sexual advances toward her (a common lie used to justify countless lynchings during the Jim Crow era). The movie allows us to feel Mamie’s pain anew, and it dramatizes her courage in turning her son’s murder and mutilation into a civil rights cause. In choosing to give Emmett an open casket funeral, she insisted that the world look at what the killers, who were acquitted by an all-white, all-male jury, had done to her child.

Directed by Chinonye Chukwu, “Till” departs from many past movies about the civil rights movement in one crucial respect: It places its Black characters front and center in their struggle, rather than giving them roles subsidiary to white saviors. Think “Mississippi Burning” (1988), a highly entertaining movie that finds two of J. Edgar Hoover’s white FBI agents (Gene Hackman and Willem Dafoe) coming to save the day after three civil rights workers are killed in Philadelphia, Miss. Or “Ghosts of Mississippi” (1996), in which the murder of civil rights activist Medgar Evers is used as a vehicle of redemption for a white prosecutor (Alec Baldwin), with Evers’ widow, Myrlie (Whoopi Goldberg), confined to the background.

That won’t fly anymore. Not with the continued death of Black Americans at the hands of law enforcement. And not with virulent racism creeping out from the edges of society at a level not seen in years.

“You have these critical race theory conversations being had by people who don’t even know what critical race theory is,” Deadwyler said in a telephone interview. “You have people who are trying to blatantly lie about what the truth of American history is. There is a need to challenge that. People have to see the film for that reason, and people have to see the film for the value in understanding what these families actually go through.”

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“Hollywood’s approach to civil rights history has achieved a level of depth and complexity in films such as ‘Selma’ that would have been unimaginable in the bad old days of ‘Mississippi Burning’ hagiography,” says Peniel Joseph, a history professor at the University of Texas at Austin who has written extensively about the civil rights movement, including the new book “The Third Reconstruction: America’s Struggle for Racial Justice in the Twenty-First Century.” “This reflects the growing and diverse numbers of Black filmmakers, executives and creators whose efforts to understand the era has matched artistry with history to create something unique in the history of American cinema: films that simultaneously offer a reflection of the past, a mirror of the present and a window into the future.”