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Mark Zuckerberg (L) and Sean Parker (R). Photos: Steven Senne/AP, Axios video

Sean Parker, the founding president of Facebook, gave me a candid insider's look at how social networks purposely hook and potentially hurt our brains.

Be smart: Parker's I-was-there account provides priceless perspective in the rising debate about the power and effects of the social networks, which now have scale and reach unknown in human history. He's worried enough that he's sounding the alarm. Parker, 38, now founder and chair of the Parker Institute for Cancer Immunotherapy, spoke yesterday at an Axios event at the National Constitution Center in Philadelphia, about accelerating cancer innovation. In the green room, Parker mentioned that he has become "something of a conscientious objector" on social media. By the time he left the stage, he jokingly said Mark Zuckerberg will probably block his account after reading this:

"When Facebook was getting going, I had these people who would come up to me and they would say, 'I'm not on social media.' And I would say, 'OK. You know, you will be.' And then they would say, 'No, no, no. I value my real-life interactions. I value the moment. I value presence. I value intimacy.' And I would say, ... 'We'll get you eventually.'""I don't know if I really understood the consequences of what I was saying, because [of] the unintended consequences of a network when it grows to a billion or 2 billion people and ... it literally changes your relationship with society, with each other ... It probably interferes with productivity in weird ways. God only knows what it's doing to our children's brains." "The thought process that went into building these applications, Facebook being the first of them, ... was all about: 'How do we consume as much of your time and conscious attention as possible?'" "And that means that we need to sort of give you a little dopamine hit every once in a while, because someone liked or commented on a photo or a post or whatever. And that's going to get you to contribute more content, and that's going to get you ... more likes and comments." "It's a social-validation feedback loop ... exactly the kind of thing that a hacker like myself would come up with, because you're exploiting a vulnerability in human psychology.""The inventors, creators — it's me, it's Mark [Zuckerberg], it's Kevin Systrom on Instagram, it's all of these people — understood this consciously. And we did it anyway." P.S. Parker, on life science allowing us to "live much longer, more productive lives": "Because I'm a billionaire, I'm going to have access to better health care so ... I'm going to be like 160 and I'm going to be part of this, like, class of immortal overlords. [Laughter] Because, you know the [Warren Buffett] expression about compound interest. ... [G]ive us billionaires an extra hundred years and you'll know what ... wealth disparity looks like."Go deeper: See the video of Parker's comments.

Go deeper: Joe Biden rips Trump's "phony nationalism".

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Go deeper

52 mins ago - Technology

Ex-N.Y. Post digital chief files lawsuit alleging sexual harassment

Richard B. Levine) (Photo by Richard Levine/Corbis via Getty Images

Former New York Post editor Michelle Gotthelf is suing her former employer, its parent company News Corp. and two editors, alleging she was reprimanded after complaining to senior executives that she was sexually harassed by retired N.Y. Post editor-in-chief Col Allan. The N.Y. Post issued a statement denying any wrongdoing.

Why it matters: "I felt that I owed it to myself and I owed it to the news organization and the people who answered to me," Gotthelf, who was a long time editor at the N.Y. Post, told Axios in an interview.

Updated 1 hour ago - Economy & Business

Airlines warn of flight cancellations amid 5G rollout concerns

Emirates SkyCargo airline Boeing 777F aircraft. Photo: Nicolas Economou/NurPhoto via Getty Images

Emirates and Delta airlines announced Tuesday that the planned rollout of 5G services at certain American airports could affect flights.

Driving the news: AT&T and Verizon announced earlier Tuesday that they would delay this week's scheduled rollout of 5G signals near a limited number of airports due to continued concerns from the aviation industry.

Updated 3 hours ago - Politics & Policy

Political consultants pocket taxpayer cash

Illustration: Shoshana Gordon/Axios

Members of Congress are turning to the same political consultants who got them elected to blast out taxpayer-funded communications from their government offices, records show.

Why it matters: While those members are barred from politicking with official funds, the firms have expertise in boosting elected officials' images for political gain and are in high demand for both campaign and government work.