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Illustration: Lazaro Gamio/Axios

Facebook’s decision to unite the technical guts of its three giant messaging services could not only cement its dominance of instant messaging but also help fend off future break-up attempts by antitrust cops.

Why it matters: Uniting the back-end technology that runs Instagram, Facebook Messenger and WhatsApp is more than just an engineering call. It will bring together users of all three apps in a single network, database and community — enabling new features and opening the door to even more anticompetitive challenges, privacy troubles and social conflicts.

Driving the news: As the New York Times' Mike Isaac reported, and Facebook confirmed to Axios, Facebook CEO Mark Zuckerberg has decided to integrate the back-end infrastructures of Instagram, WhatsApp and Facebook Messenger so that users of all three can directly message one another. The plan is still early and exploratory, according to Facebook.

What it means for Facebook's business

Reorganizing the codebases for Facebook's messaging services so that they are essentially one application with three different interfaces could make it much harder for a court or regulator to order a breakup of Facebook's properties, as some critics are proposing.

  • In its antitrust case 20 years ago, Microsoft famously argued that even though its web browser was originally a separate application, the browser's code had become too deeply entwined with the Windows operating system to remove.
  • Microsoft lost that argument, but Facebook's lawyers and developers may be able to learn from its predecessor's mistakes.

Facebook's integration plan is all about improving interoperability among its own "family of apps." But regulators and many users will also want to know whether Facebook's changes will help, or hinder, the messaging services' ability to communicate with users on competing services.

  • Apple runs its own vast text-messaging universe (iMessage), and the mobile phone carriers run another. Messages can easily cross those systems, but Facebook's messaging remains a world apart.
  • Facebook may be weighing a more open approach, streamlined by this integration plan — but such a move would be out of keeping with its past behavior.

Zuckerberg's plan would also bolster Facebook's utility for its business customers, per Axios' Sara Fischer:

  • Millions of companies around the world use Facebook’s messaging tools as a business-to-business communications platform between vendors and consumers.
  • Facebook has heard from many businesses that it’s difficult to effectively operate all of its messaging services simultaneously.
What it means for privacy on Facebook

Zuckerberg has decided that all of the services should protect users' messages with end-to-end encryption by default, currently offered only on WhatsApp, according to the Times report.

  • Encryption can be a boon to users fearful of surveillance or who want to protect their personal data from commercial abuse.

No details are known of Facebook's plans, so it's impossible to say whether they will ultimately enhance user privacy or end up sparking new data scandals.

  • But Facebook's controversies over sharing user data have left a residue of mistrust in parts of the public and with some legislators, who will be less likely to give it the benefit of the doubt.
  • Sen. Ed Markey (D-Mass.) responded to the news with a statement: "We cannot allow platform integration to become privacy disintegration.” Sen. Richard Blumenthal (D-Conn.): "Once again, Mark Zuckerberg appears eager to breach his commitments in favor of consolidating control over people and their data."
What it means for Facebook users

When Facebook acquired Instagram (2012) and WhatsApp (2014), it said it would keep both services running separately under their original leadership. But the founders of both companies departed last year.

  • Given Facebook's mission — "build community and bring the world closer together" — it makes sense that Zuckerberg would look at three separate messaging products and want to unite them.

Yes, but: People's lives are tangled up in these apps in complex ways. Instagram and WhatsApp evolved as separate products with their own unique features and user behavior patterns.

  • WhatsApp let users sign up for accounts with nothing more than a phone number, but Facebook is committed to users' having a single "real-world" identity.
  • Instagram has become a petri dish for memes, "influencers" and other epiphenomena of visual online culture.
  • Many users of Instagram and WhatsApp don't realize they're on Facebook-owned turf. Linking the services will tie their public images to Facebook's, which has taken a beating, Axios' Ina Fried notes.

Treating these vast digital realms as interchangeable reservoirs of users may leave a bad taste for many, but that's not likely to slow Zuckerberg down.

  • Facebook has a record of rearchitecting the social landscape for its own needs without users having a say.
  • The social network sparked its most famous user rebellion back in 2006, when it first introduced the Newsfeed.
  • The protests died out; the Newsfeed is the very heart of today's Facebook.

The bottom line: Facebook has always aimed to define and map the "social graph" of humanity. It was only a matter of time before Instagram and WhatsApp users were added to that graph.

Go deeper

Updated 2 hours ago - Sports

Swimmer Chase Kalisz first American to win Olympics gold medal

Chase Kalisz of Team United States celebrates after winning the Men's 400m Individual Medley Final on day two of the Tokyo 2020 Olympic Games at Tokyo Aquatics Centre in Tokyo, Japan. Photo: Al Bello/Getty Images

Swimmer Chase Kalisz became on Sunday the first Team USA Olympian to win gold at the Tokyo Games.

The big picture: The Rio 2016 silver medalist's winning time in the men's 400 meters Individual Medley Final was 4 minutes 9.42 seconds. His teammate Jay Litherland took silver .86 seconds later.

California's largest wildfire razes homes as 88 huge blazes burn in U.S.

Firefighters on the scene as dozens of homes burn during the Dixie Fire in the Indian Falls neighborhood of unincorporated Plumas County, California, on July 24. Photo: Josh Edelson/AFP via Getty Images

Flames from California's biggest wildfire were engulfing homes in the state's north overnight — one of 88 large blazes raging in the U.S.

Driving the news: The Dixie Fire, which erupted July 14 near the origin of the deadly 2018 Camp Fire in Butte County, was tearing through the community of Indian Falls in the neighboring Plumas County, per AP.

Golfer Bryson DeChambeau will miss Olympics after testing positive for COVID

Bryson DeChambeau of the United States on the 18th tee during Day Two of the 149th Open at Royal St George’s Golf Club on July 16 in Sandwich, England. Photo: Andrew Redington/Getty Images

Bryson DeChambeau has tested positive for COVID-19 and will miss the Tokyo Olympic Games, USA Golf announced late Saturday.

What he's saying: "I am deeply disappointed not to be able to compete in the Olympics for Team USA," DeChambeau said in a statement.