Week 2 of the NFL season is now complete, and what once would have been unimaginable is now becoming commonplace.

I'm talking about protests — player protests — visible, controversial, much-talked-about displays during the playing of the national anthem, before NFL games, in stadiums, around the country.

These protests began nearly a month ago when San Francisco 49ers backup quarterback Colin Kaepernick chose to sit rather than stand while The Star-Spangled Banner was being played during a preseason game.

Since then, we've seen various athletes sit, kneel, lock arms and raise fists during the national anthem — all, they say, out of concern and anger over violence against African-Americans in our cities.

The vast majority of these athletes have been NFL players, but not all.

High school football players from New Jersey to Washington state, from Illinois to Texas, have joined in.

So have a few college players.

And then there's soccer star Megan Rapinoe — taking a knee even while playing for the U.S. national team, something that would have been unthinkable for any U.S. Olympian just last month in Rio.

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Megan Rapinoe kneels during the national anthem before the match between the United States and the Netherlands at the Georgia Dome on Sept. 18.

Kevin C. Cox/Getty Images

Once again, sports has taken us to an important national conversation.

Whether it's the Ray Rice video and domestic violence or Lance Armstrong and cheating or Title IX and the advancement of women in our nation — we should see these as cherished conversations that reach people who otherwise might not take part, agree or disagree, defend the protest or despise it.

We're seeing something we did not witness during the Michael Jordan-Tiger Woods era a decade or two ago: sports as a vehicle not just for making money, but for social change.

Jordan and Woods were not much interested in speaking out about anything remotely controversial. In this way, they were significantly out of step with the athletes who came before them: Muhammad Ali, Billie Jean King, Arthur Ashe, Tommie Smith and John Carlos, to name a few.

Athlete Activists Aren't New. Kaepernick Is Just The Latest.

So it appears that highly publicized social activism in sports skipped a generation.

It's back now, yet it's natural to ask if this isn't all talk — all kneeling — and no real action.

Not for Kaepernick. He has vowed to donate $1 million this year to groups in the Bay Area that are fighting social inequality. His team, the 49ers, has vowed to match it.

Many have wondered where this all leads, not necessarily next week, but in the next few months, even into next year.

Do the protests eventually wither away? Does everyone just get bored by it all? Well, the new NBA season starts in little more than a month, and we certainly should expect to see protests there. College basketball, too, both men's and women's. And high school hoops as well.

From one season to the next, sports will keep coming.

It sounds like the conversation will, too.

This article appeared on NPR on September 21, 2017, before the remarks and Tweets by Trump heated the conversation to the boiling point, calling for violence against and firing of protesting athletes

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September 24, 2017

Addendum.

1. Kareem Abdul-Jabbar Calls Colin Kaepernick's Concerns 'Very Admirable'