In his first public comments about his future political plans, Colin Kaepernick says he intends to talk about “the importance of social justice” in a 2020 memoir.

“Whether you’re a player, coach, general manager, student or teacher,” he said in a letter Thursday, “the conversations I hope to catalyze in your homes and on your campuses will help change the world.”

Kaepernick, the former 49ers quarterback who sparked a national conversation on racial inequality and police brutality with his 2016 protests during the national anthem, has voiced his support for Democrats in recent months and is expected to become a likely 2020 presidential candidate. In his letter, he wrote that he’ll begin writing the memoir “in the weeks ahead.”

“This book will be a story of my evolution from athlete to socially conscious citizen,” he said. “It’s my hope that in telling my story I can serve as a human bridge between people from all walks of life. My hope is that I can touch you where you are, and inspire you to become the person that can stop the hatred and help make the world a better place.”

Kaepernick is the latest athlete to announce he will tell his story in the future. In September, former New York Yankees slugger Alex Rodriguez said he wanted to write a book about his life and career after retiring from baseball. In October, Oklahoma Sooners football coach Lincoln Riley said he planned to write “a book that’s going to show what Oklahoma means to me.”

Kaepernick, for one, seems to enjoy providing glimpses into his personal life. A few days after President Trump shared on Twitter that he was considering stripping the Green Bay Packers of their pick in the 2020 NFL draft because of its association with Kaepernick, the quarterback posted a photo of himself along with a message that read, “thank you for the invite .”

The NFL hasn’t publicly discussed the prospect of revisiting its policy regarding the national anthem, which was originally written to preclude players who weren’t on the field for the anthem from staying in the locker room. But after an owner’s meeting in New York last month, Giants co-owner John Mara said the league is likely to revisit the idea.

Mara also revealed that he reached out to Kaepernick’s mother, Terry, to ask whether she wanted her son to stand for the anthem and stay in the locker room “as long as that would be permissible.”

“It would be a long night for her, I would imagine,” Mara said of Terry Kaepernick’s request. “(But) if she came out of that night without her son having to stand for the anthem, I think she would have to be darned proud.”

Kaepernick has recently participated in a series of activist events tied to the 2019 NFL season. He was in Boston, where he met with Bostonians and wore a shirt that read “We Stand,” during an open-air rally to protest police violence on Tuesday, then he was in New York for a West Indian Day Parade that ended up turning into a protest about a shooting in Harlem on Wednesday.

“My name is Colin Kaepernick and I stand for something,” he said at the West Indian Day Parade, according to the New York Daily News. “Everybody’s not going to agree with all the things that I’m saying. I understand that. But that’s the point.”