Mug shot No. 7053 is one of the most iconic images of Rosa Parks. But the photo, often seen in museums and textbooks and on T-shirts and websites, isn’t what it seems. Though it’s regularly misattributed as such, it is not the mug shot taken at the time of Mrs. Parks’s arrest in Montgomery, Ala., on Dec. 1, 1955, after she famously refused to give up her seat on a bus to a white passenger. It was, in fact, taken when she was arrested in February 1956 after she and 88 other “boycott leaders” were indicted by the city in an attempt to end the boycott. The confusion around the image reveals Americans’ overconfidence in what we think we know about Mrs. Parks and about the civil rights movement.

Martin Luther King Jr. and Rosa Parks dominate the Civil Rights Movement chapters of elementary and high school textbooks and Black History Month celebrations. And yet much of what people learn about Mrs. Parks is narrow, distorted, or just plain wrong. In our collective understanding, she’s trapped in a single moment on a long-ago Montgomery bus, too often cast as meek, tired, quiet and middle class. The boycott is seen as a natural outgrowth of her bus stand. It’s inevitable, respectable and not disruptive.

But that’s not who she was, and it’s not how change actually works. “Over the years, I have been rebelling against second-class citizenship. It didn’t begin when I was arrested,” Mrs. Parks reminded interviewers time and again.

Born Feb. 4, 1913, she had been an activist for two decades before her bus stand — beginning with her work alongside Raymond Parks in 1931, whom she married the following year, to organize in defense of the “Scottsboro Boys” (nine Black teenagers who were falsely accused of raping two white women). Indeed, one of the issues that animated her six decades of activism was the injustice of the criminal justice system — wrongful accusations against Black men, disregard for Black women who had been sexually assaulted, and police brutality. With a small group of other activists, including E.D. Nixon, who would become branch president, she spent the decade before her well-known bus stand working to transform the Montgomery NAACP into a more activist chapter that focused on voter registration, criminal justice and desegregation. This was dangerous, tiring work and Mrs. Parks said it was “very difficult to keep going when all our work seemed to be in vain.” But she persevered.

Dispirited by the lack of change and what she called the “complacency” of many peers, she reformed the NAACP Youth Council in 1954 and urged her young charges to take greater stands against segregation. When 15-year-old Claudette Colvin was arrested for refusing to give up her seat on a bus in March 1955, many Black Montgomerians were outraged by Mrs. Colvin’s arrest, but some came to decide that the teenager was too feisty and emotional, and not the right test case. Mrs. Parks encouraged the young woman’s membership in the Youth Council and was the only adult leader, according to Ms. Colvin, to stay in touch with her the summer after her arrest. Mrs. Parks put her hope in the spirit and militancy of young people.