Talking frankly about race relations isn’t the kind of thing that normally happens at a massive accounting firm. But this past summer, PricewaterhouseCoopers took time out to do just that, starting a conversation that’s now reshaping the way the 45,000-person company handles hiring and promotions.

PwC employees gathered in groups and one-on-one meetings around the country on July 21 and got very real about their experiences with race in America, including at the office. Black employees talked about feeling that they could not fully be themselves on the job.

“You have to have one foot in and one foot out. ... Living as a black person but wanting to be accepted in a place where you are trying to be successful,” a young tax associate said in Atlanta.

“You have to leave yourself at home and then try twice as hard as everybody else when you get to the office,” said an intern in Washington.

Those quotes come from the accounting firm’s U.S. CEO and chairman, Tim Ryan, who wrote up what happened that day in a LinkedIn post.

“More tears were shed at Pricewaterhouse than in our 120-year history,” Ryan told The Huffington Post recently.

Change starts with listening. PwCers are getting together today to talk diversity in light of recent events. #colorbrave #firststep — Tim Ryan (@Timothy_F_Ryan) July 21, 2016

The summer of 2016 had been particularly hard on the company’s black employees, many of whom felt shook up by a spate of racially charged gun violence. Over just the first week of July, Philando Castile was shot and killed by a police officer in a suburb of St. Paul, Minnesota, with the whole event broadcast live on Facebook. In Baton Rouge, another black man, Alton Sterling, was also shot to death by police. Then a sniper in Dallas went after the police themselves at a Black Lives Matter rally.

It was overwhelming, and yet black employees in particular felt like they couldn’t talk about it at the office. “When I came to work on Friday, the silence was deafening,” one person wrote to Ryan that month.

Ryan was then just a few days into the role of CEO ― although he’d been with the firm for 28 years ― and he hadn’t thought that one of his first priorities would be addressing diversity and inclusion issues. Suddenly, it was. He kicked off his response in the usual corporate way, with a company-wide email. He acknowledged the tragic events and asked how people were doing.

Hundreds of emails poured in from employees feeling scared and anxious and seeking to be understood. Ryan shared some in his LinkedIn post:

“When I was a new associate, after my first busy season, my younger brother was shot and killed by a police officer ... he was 22 years old ... The firm in many ways helped me get through that tragic event,” a senior manager wrote.

“As a black woman, who is married to a black man, I’m scared every day for him. I support the New York Black Inclusion Network (BIN) and we just had a conversation today on what we could do ... to move this country forward,” another manager said.

Ryan wanted more talk like this. And so the day of conversation was conceived.

Another company-wide email went out.

“These conversations are not easy and sometimes uncomfortable,” Ryan wrote in the email, which he shared with HuffPost. “But one thing I’ve heard this week is that it’s also uncomfortable when the issues that are on the top of our minds are not part of the conversation at work.”

It might seem misplaced to get this personal at work. It’s definitely unusual in corporate America. But having these kinds of deep discussions, opening up about how you’re doing, is simply an acknowledgement that work is where we spend a lot of our time, said Ryan.

People should feel they can be themselves at the office, he said. And from the boss’s perspective, creating a supportive workplace is not just the right thing to do; it’s another way to improve employee performance. You work your best when you feel at home and your voice is heard.

“Discussing these types of difficult topics is usually assumed to be the responsibility of community leaders, politicians, and activists,” Ryan wrote on LinkedIn. “But our people spend a good portion of their lives within the walls of this firm and more than anything, I want them to be able to bring their whole selves to work.”

Wisdom from colleague: "When you're too busy to listen to someone struggling with race in the

workplace, that's when it's needed the most." — Tim Ryan (@Timothy_F_Ryan) October 28, 2016

Pricewaterhouse, like its peers in the industry, has many programs on diversity and inclusion, but the openness of the July event was new. “We’ve been practicing ever since,” Ryan said.

The conversations are ongoing in the PwC office in Tysons Corner, Virginia, just outside Washington, third-year associate Javier Perez told HuffPost. Although now it feels rather ordinary to talk openly at work, Perez said that his friends elsewhere are taken aback at the idea ― and wish their companies would do something similar.

“They’re like, ‘That would be great,’” he said.

Those stronger lines of communication helped after the presidential election, Perez said, when a group in his office gathered to talk through their shock.

The November surprise of Donald Trump’s win triggered anxiety among many employees, Ryan said. Immediately afterward, he tweeted out a video emphasizing his commitment to diversity.

As today draws down and we absorb the end of this election, I wanted to share a message I sent to our people at PwC. https://t.co/Rwsef9dRhh — Tim Ryan (@Timothy_F_Ryan) November 9, 2016

“What we’ve done is tried to be apolitical but clear to our people ― internally and on social media ― that we are doubling down and inclusion is more important than ever,” Ryan said.

A handful of other large companies, including Apple and PwC’s competitor EY, sent out similar kinds of post-election notes to employees, Bloomberg recently reported.

All this talk at PwC has led to a policy shift. This past week, the company announced that people receiving promotions must now go through unconscious-bias training before they can take on their new roles. The training ― which new hires will also be required to do ― is basically watching four videos of 15 minutes to an hour, meant to help employees understand and uncover their blind spots and prejudices when it comes to gender and race.

This is not a modest undertaking. PwC hires 17,000 people every year (including interns) and promotes about 7,500.

Ryan had worried that making the training mandatory could fuel some resentment. There is research that seems to back up his concern. Studies have shown that the negative sentiment can even undermine the chances of advancement for minorities. Attendance at the talk event on July 21 had been optional. And Ryan was careful to note that the bias training wasn’t meant to be punitive. In some companies, it comes off that way because it’s only required after an incident.

He made the decision to go ahead after actually talking to employees in PwC’s black affinity group.

“After speaking to black professionals [inside the company], their strong view was this should be tied to leadership,” Ryan said. In other words, if you’re going to move up at the firm and manage other people, you must sharpen your sensitivities because the firm places a strong value on diversity.

PwC At the very top, PwC is run by a group of men, all with the title of chairman.

Corporate America is still struggling to move more women and people of color into its upper ranks. Even at PwC, the top five employees are all men, all titled “chairman.” Below that level, the firm’s leadership roles are filled by a more balanced mix of men and women. Among recently promoted partners, 44 percent were women and minorities, the firm said. (It declined to provide more detailed demographic data on its employees.)

Bias training isn’t unique to PwC. Nearly all Fortune 500 companies offer some form of anti-discrimination program. But in recent years, the emphasis has slowly begun to shift from “here’s how to avoid getting sued” to “here’s what you need to know about your own biases.”

“Suddenly you go from being completely oblivious to going, ‘Oh my God, it’s everywhere,’” is how Laszlo Bock, chief people officer at Google, described the effect of bias training to The New York Times in 2014.

Someone else who’d been through the training at Google noticed that all the conference rooms in one particular building were named after men, according to the Times. Small details like that can add up to an environment that subtly tells women and minorities they don’t belong. The names were changed.

Training isn’t enough, of course.

Other tactics that work?

Natalie Sue Johnson, a partner at diversity consulting firm Paradigm, suggested having diverse groups of employees talk to and interact with one another.