WASHINGTON (AP) — Seventy years ago this week, the U.S. Supreme Court ruled separating children in schools by race was unconstitutional. On paper, that decision — the fabled Brown v. Board of Education, taught in most every American classroom — still stands.

But for decades, American schools have been re-segregating. The country is more diverse than it ever has been, with students more exposed to classmates from different backgrounds. Still, around 4 out of 10 Black and Hispanic students attend schools where almost every one of their classmates is another student of color.

The intense segregation by race is linked to socioeconomic conditions: Schools where students of color compose more than 90% of the student body are five times more likely to be located in low-income areas. That in turn has resounding academic consequences: Students who attend high-poverty schools, regardless of their family’s finances, have worse educational outcomes.

Efforts to slow or reverse the increasing separation of American schools have stalled. Court cases slowly have chipped away at the dream outlined in the case of Brown v. Board, leaving fewer and fewer tools in the hands of districts to integrate schools by the early 2000s.

The arc of the moral universe, in this case, does not seem to be bending toward justice.

“School integration exists as little more than an idea in America right now, a little more than a memory,” said Derek Black, a law professor at the University of Southern California. “It’s actually an idea that a pretty good majority of Americans think is a good idea. But that’s all.”

MORE THAN JUST DIVERSE SCHOOLS

The dream of Brown was never as simple as diversity. It was about equality, and the opportunity that came with it.

From the beginning, funding and integration have been inseparable.

“Whiter schools and districts have more resources, and that is wrong,” said Ary Amerikaner, a former Obama administration official and the founder of Brown’s Promise. “But it is a reality. And that undermines opportunity for students of color, and it undermines our future democracy.”

We remember Brown v. Board as the end of segregated schools in the United States. But stating values does not, alone, change reality. Though the case was decided in 1954, it was followed by more than a decade of delay and avoidance before school districts began to meaningfully allow Black students to enter white schools.

It took further court rulings, monitoring and enforcement to bring a short-lived era of integration to hundreds of school districts. For the students who took part in those desegregation programs, their life trajectory changed — the more years spent in integrated schools, the better Black children fared on measures like educational attainment, graduation rates, health, and earning potential, with no adverse effects on white children.

For a brief period, it seemed the country recognized the deeper remedies required. “All things being equal, with no history of discrimination, it might well be desirable to assign pupils to schools nearest their homes,” Chief Justice Warren Burger wrote in Swann v. Mecklenburg, a 1971 decision that upheld the use of busing to integrate schools in North Carolina. “But all things are not equal in a system that has been deliberately constructed and maintained to enforce racial segregation.”

But not long after, another series of court decisions would unwind those outcomes. Fifty years ago, in Milliken v. Bradley, the court struck down a plan for integrating Detroit public schools across school district lines. The ruling undermined desegregation efforts in the north and Midwest, where small districts allowed white families to escape integration.

Other decisions followed. In Freeman v. Pitts, the court ruled resegregation from private choice and demographic shifts could not be monitored by the court. More than 200 districts were released from court-monitored desegregation plans. By 2007, when the court ruled in Parents Involved v. Seattle Public Schools, even voluntary integration plans could no longer consider assigning students on the basis of race.

“If you have the tools taken away from you … by the Supreme Court, then you really don’t have a whole lot of tools,” said Stephan Blanford, a former Seattle Public Schools board member.

ONE DISTRICT AS A MICROCOSM

The arc of history is clear in the city where the landmark Swann busing case originated.

At its peak, Charlotte-Mecklenburg Schools was considered such a success at integrating classrooms and closing the gap between Black and white students that educators around the country came to tour the district. Today, more than 20 years after a court ruling overturned busing students on the basis of race, CMS is the most segregated district in North Carolina.

While there are no laws that keep kids siloed by race and income, in so many schools that is the reality.

Charlotte’s sprawling, complex busing plan brought Black and white students into the same schools — and by extension, made white children’s resources available to Black students for the first time. The district’s integration program ended when white families sued after their children did not get their top choice of school placement in a lottery that considered race.

Instead, the district created a school assignment process that said diversity “will be based on the family’s decisions.” It left the families of Mecklenburg County, some of whom have always had better choices than others, on their own. In the first year of the district’s choice program, Black families were more likely to try to use the choice plan to pick an alternative school. They were also more likely to get none of the magnet schools they wanted.

In the decades that followed, the district re-segregated. Years of busing had unwound the segregated makeup of the schools, but the underlying disparities and residential segregation had been left untouched.

Charlotte is a place where the divide between affluence and poverty, and the clear racial lines that mirror it, are so stark that people who live there refer to the city in two parts — the well-off “wedge” and the poorer “crescent.” How could anything other than an explicit consideration of those conditions ever hope to ameliorate them?

Solutions to segregated schools exist in this context, often relying on individual families to make choices that are limited by their circumstances. Magnet schools and inter-district transfers — two common policies that may create great individual opportunities — are limited and will always leave some students behind.

Wherever you look, families are divided in how they view integration. For white and affluent families, it can exist as a noble idea, one filled with self-reflection. But for families of color or poor families — those with less of a safety net — the point of integration often is to place their children somewhere better.

Efforts to integrate schools can take two paths, Stefan Lallinger, executive director of Next100, a public policy think tank, says. They either fight around the margins, creating slightly less segregated spaces, or they address the problem head on, which in many parts of the country would mean tackling boundaries deliberately drawn to separate rich from poor.

HOW TO MOVE

FORWARD IN A

SYSTEM THAT

RESISTS?

Amerikaner and Saba Bireda founded Brown’s Promise on the idea of bridging the divide between funding and integration, leveraging state courts to obtain the tools the Supreme Court has taken away from districts.

Their strategy has some precedence. In Connecticut, a 1989 lawsuit in state court resulted in the creation of an inter-district transfer program, which allows students in Hartford to transfer into suburban schools and magnet programs, breaking up concentrations of poverty and racially isolated schools.

“This country had to be moved to integration,” Bireda said. “And unfortunately, 70 years later, we feel like we still need litigation. We need the push of the courts.”

More recent lawsuits have taken place in New Jersey and in Minnesota. In 2015, Alex Cruz-Guzman became a plaintiff in a lawsuit challenging segregation in Minneapolis and St. Paul public schools. Cruz-Guzman immigrated to the United States from Mexico as a teenager. As a parent, he noticed his children’s schools consisted almost entirely of other Latino students. When he tried to place them in more integrated schools, the family faced long waitlists.

The case wound its way through court for nearly a decade, almost reaching a settlement in the legislature before that bill failed to pass.

Cruz-Guzman recalls people asking why he would join a case that likely would not resolve in time to benefit his own children, who struggled with learning English for a time in predominantly Latino schools. To him, the arc of the case is about the kids whose lives could change in the future.

“It’s not only my kids. My grandkids will benefit from it,” he says. “People for generations will benefit.”

How far those legal cases can reach remains to be seen. Actual solutions are imperfect. But integration is something this country has tried before, and while it lasted, by many measures, it worked.

Anniversaries are moments to stop and contemplate. Seventy years after Brown, the work towards achieving its vision remains unfinished. Where there are no perfect, easy answers, what other choice is there besides trying imperfect pathways that bring about an increasingly diverse country somewhere closer to the promise of Brown?

“What’s the alternative?” Bireda said. “We are headed towards a country that is going to be majority people of color. … We can be a strong multiracial democracy, but we cannot be that if we continue to allow most children in the United States not to go to school with children who are from different backgrounds.”