This is the most important sentence to come out of the Supreme Court today

Over the long term, the Supreme Court's ruling Thursday on the Fair Housing Act is potentially even more important than its Obamacare decision.

There may not have been quite as much hand-wringing on the front pages about it, but it affects how and where many Americans will live, work, and go to school for generations into the future.

And in one line of the decision, which was written by Justice Anthony Kennedy, the Court acknowledged one of the most pervasive and hidden forms of discrimination in our modern society.

This is the key sentence, written by Justice Kennedy: "Recognition of disparate-impact liability under the FHA plays an important role in uncovering discriminatory intent: it permits plaintiffs to counteract unconscious prejudices and disguised animus that escape easy classification as disparate treatment."

With this decision, the country's highest court has recognized that unconscious and structural discrimination is real, and can be a civil rights violation. A policy doesn't have to have "no black people allowed" stamped on the front of it in order for the courts to rule that it is a violation of the law. And that's important, particularly because of the way that discrimination has evolved in this country.

It's no longer politically correct to talk openly about groups you don't like. But that doesn't mean discrimination has magically gone away - it just makes it harder to prove that it's still here.

Discriminatory talk is all but gone from (public portion of) the workplace and hiring decisions. Yet, when you count up the CEOs of Fortune 500 companies, fewer than 5% are female, fewer than 1% are black. Unconscious bias prevails. Today, the Supreme Court recognized that.

The Fair Housing Act decision on its face sort of seems like it's in the weeds of wonkery - it revolves around something called "disparate-impact liability," and it doesn't help that its called Texas Department of Housing and Community Affairs v. Inclusive Communities Project - but it's actually pretty straightforward. The main point is that the Fair Housing Act allows prosecutors to sue for racist housing policies even if they can't prove explicit racism. In other words, lawsuits about fair housing can be about the effect of a policy, regardless of intention. People now have a recourse to fight unspoken discrimination.

In today's decision, the Supreme Court upheld the government's right to prosecute someone for violations of the FHA if it can prove that 1) minorities that were in a similar situation to whites (similar incomes, etc) were treated differently, and 2) there were other policies available that would have been less discriminatory.

And there's no question there are racial disparities in the housing market. Nearly all America's major cities have racially segregated housing. It started as a conscious policy, with legal redlining policies in the mid-20th century. But long after redlining was cast aside, discrimination remains.

Just last month, New York magazine excerpted DW Gibson's new book on gentrification. In it, a landlord in Brooklyn admits he pushes out his black tenants. "If there's a black tenant in the house-in every building we have, I put in white tenants. They want to know if black people are going to be living there," he says.

Ta-Nehisi Coates wrote last year in the Atlantic that housing discrimination is one of the most "elegant" forms of racism. He said:

If you sought to advantage one group of Americans and disadvantage another, you could scarcely choose a more graceful method than housing discrimination. Housing determines access to transportation, green spaces, decent schools, decent food, decent jobs, and decent services. Housing affects your chances of being robbed and shot as well as your chances of being stopped and frisked. And housing discrimination is as quiet as it is deadly. It can be pursued through violence and terrorism, but it doesn't need it. Housing discrimination is hard to detect, hard to prove, and hard to prosecute.

When discussing all of the impacts of housing discrimination - all the things that Coates mentions: schools, green spaces, policing, food, jobs - all that matters is that it exists, not how we got there.

Housing has a larger effect on how a person perceives the world around them than almost anything save consciousness itself. It's important that a person's right to housing options without bias be protected.