Research shows that if people are talking and listening to like-minded others, they become more dogmatic, more unified, and more extreme. Personalized Facebook experiences are a breeding ground for misunderstanding and miscommunication across political lines and, ultimately, for extremism.

Facebook is the social graph with the organizing principle around your friends and your social life. LinkedIn is the professional graph, organized around you, your job, your industry, your title and your function. At Chegg, we are building a student graph centered around you, as a student.

When I look at founders and CEOs like Mark Zuckerberg at Facebook and Brian Chesky at Airbnb and Sebastian Thrun at Udacity, these are companies that are creating extraordinary social good and extraordinary economic and educational empowerment, all within with context of a for-profit model.

Facebook is about seeing what your friend is doing. Twitter, you follow different people. Flipboard is about passions and interests and topics, and so it's the same social web that all of these products are letting you look at, but Flipboard is coming at it from a more topical point of view.

Facebook was founded on February 4, 2004. On February 5, we were feeling pretty confident, even from observing the first few hours of usage. Students used it like crazy. They'd sign up then spend the next 3-4 hours on it. Then we'd go to lecture hall and see it on every computer screen there.

Donald Trump won, or he got the majority of the electoral votes, a large majority. I think it would be patronizing to say that the majorities of people in Florida and Ohio, smaller majorities in Wisconsin and Michigan, that they voted for him because they were misled by something on Facebook.

I won't sell any Facebook shares as long as I'm on the board. When I leave, all my Facebook shares will be donated to two or three D.C. education-related charities I've supported over the years. Thus, a small portion of Facebook's success will be shared with low income students in Washington.

I have no idea how to get in touch with anyone anymore. Everyone, it seems, has a home phone, a cell phone, a regular e-mail account, a Facebook account, a Twitter account, and a Web site. Some of them also have a Google Voice number. There are the sentimental few who still have fax machines.

You could have a zillion Facebook followers. Those people don't buy records. It's about a hundred to one...Record companies, they don't have any money, so they see social media as the free marketing... So... 'Billy, light yourself on fire and stand upside down, and that'll market the record.'

Facebook is not a physical country, but with 900 million users, its 'population' comes third after China and India. It may not be able to tax or jail its inhabitants, but its executives, programmers, and engineers do exercise a form of governance over people's online activities and identities.

Facebook's headquarters is a two-story building at the end of a quiet, tree-lined street. Zuckerberg nicknamed it the Bunker. Facebook has grown so fast that this is the company's fifth home in six years - the third in Palo Alto. There is virtually no indication outside of the Bunker's tenant.

Kamala Harris is fumbling and she's like, 'Oh, I'm going to go after Twitter because Elizabeth Warren sucked all the oxygen out of the room.' She's standing up and saying, 'I'm going to go after Facebook, I'm going to break them up, I'm going to go after all of these big technology companies.'

Having to censor yourself - whether it's lying at the water cooler about how you spent your weekend, scrubbing your Facebook page of any revealing facts, or pretending to be with someone you aren't - is the antithesis of our foundation as a nation based on freedom of expression and association.

AI does not keep me up at night. Almost no one is working on conscious machines. Deep learning algorithms, or Google search, or Facebook personalization, or Siri or self driving cars or Watson, those have the same relationship to conscious machines as a toaster does to a chess-playing computer.

We now expect Google, Facebook, Twitter and other companies to police the Internet for dangerous and illegal material - violent, terrorist, criminal - and some democratic governments require them to do so. But what if they did decide to repress material for political reasons? How would we know?

I remember being on this film once, and people said, 'You're not on Instagram or Facebook - what's your deal?' They said, 'In this industry, if you want to do well, people want to invest in who you are.' I said, 'I'm an actor, not a celebrity - they watch my acting, and hopefully that's enough.'

I've yet to use a cellphone, and I've never tweeted or entered Facebook. I try not to go online till my day's writing is finished, and I moved from Manhattan to rural Japan in part so I could more easily survive for long stretches entirely on foot, and every trip to the movies would be an event.

Wildly successful sites such as Flickr, Twitter and Facebook offer genuinely portable social experiences, on and off the desktop. You don't even have to go to Facebook or Twitter to experience Facebook and Twitter content or to share third-party web content with your Twitter and Facebook friends.

Facebook captures examples of inequality and makes them available for endless replay. Twitter links the voiceless to newsmakers. Instagram immortalizes the faces and consequences of discrimination. Isolated cruelties are yoked into a powerful narrative of marginalization that spurs a common cause.

In addition to building better products, a more open world will also encourage businesses to engage with their customers directly and authentically. More than four million businesses have Pages on Facebook that they use to have a dialogue with their customers. We expect this trend to grow as well.

I've always liked the fact that anyone with a great idea, access to the Internet, and an unrelenting will can spark a world-beating company simply by standing up code on the Internet and/or leveraging the information and relationship network that is the web. That's how Facebook started, after all.

The novel, as a genre, was once considered a diversion every bit as frivolous as Facebook, but over the years, we've managed to convince ourselves that reading fiction is as important to our mental digestion as fresh fruits and vegetables are to the processes that take place a little further down.

If you want positive search results, do positive things. If you don't want negative search results, don't do negative things. To some of my colleagues across the aisle, if you're getting bad press articles and bad search results, don't blame Google or Facebook or Twitter. Consider blaming yourself.

As a writer and sometime activist who needs to promote my books and articles and occasionally rally people to one cause or another, I found Facebook fast and convenient. Though I never really used it to socialize, I figured it was OK to let other people do that, and I benefited from their behavior.

The thing to keep in mind is that's how I started long before MTV and Twitter and Facebook. I studied at broadcasting school so I could learn how to shoot and edit videos, and tried to create my own television show so we could see through these wacky visions we had of funny bits we wanted to shoot.

I hope that Facebook and other Internet technologies were able to help people, just like we hope that we help them communicate and organize and do whatever they want to every single day, but I don't pretend that if Facebook didn't exist, that this wouldn't even be possible. Of course, it would have.

'Digiphrenia' is really the experience of trying to exist in more than one incarnation of yourself at the same time. There's your Twitter profile, there's your Facebook profile, there's your email inbox. And all of these sort of multiple instances of you are operating simultaneously and in parallel.

I would hate to be in high school now. Psychologists talk about the 'imaginary audience' that teens seem to feel they have around them and that makes them think they have to keep up their image all the time. Now with Facebook and MySpace and 24/7 online access, that imaginary audience has become real.

Elon Musk is talking about silicon nanoparticles pulsing through our veins to make us sort of semi-cyborg computers. But why not take a noninvasive approach? I've been working and trying to think and invent a way to do this for a number of years and finally happened upon it and left Facebook to do it.

I would argue heavily that the time that has been allocated to social used to come from television, and people are benefitting from it. People who are saying, 'Aw, you're spending all your time on Facebook, or all your time on Twitter,' I'd like to understand what the person used to do with that time.

Email is the lowest common denominator. It's the way you get communications from one person to another. There isn't really an alternative. Sometimes people will have Facebook messenger turned on, but 99 percent of the time, if you're sending a message to a human you don't know well, you're using email.

Do we value privacy in any real way? Thinking about blogs, Twitter, Facebook, MySpace... all these suggest we value exposure rather more. And instead of challenging this transformation, as they are supposed to - certainly at the more thoughtful edges of the art - novelists are buying into it wholesale.

The way the Facebook network is set up, it's not as suitable for content discovery. Twitter is better, but there are too many over-sharers. Also, on Twitter and Facebook, everything comes from people you know. On StumbleUpon, it comes from people that you don't necessarily know but share your interests.

I was active on Facebook for a while, responding to comments and thanking fans for their appreciation. But I found that the Facebook feed was numbing my emotions. I'd see an extraordinarily tragic news item, and even before I could react to it, see a hilarious meme right below it. This was confusing me.

There are a few other things that I built when I was at Harvard that were kind of smaller versions of Facebook. One such program was this program called Match. People could enter the different courses that they were taking, and see what other courses would be correlated with the courses they are taking.

Sometimes I'll be sitting on Facebook at home and see all these people getting married, having kids, having that life that I was told I should have. And sometimes I feel like I'm doing something wrong. Am I the stupid one here? Am I not doing what I'm supposed to do? And that's also equally as stressful.

Facebook has never been merely a social platform. Rather, it exploits our social interactions the way a Tupperware party does. Facebook does not exist to help us make friends, but to turn our network of connections, brand preferences and activities over time - our 'social graphs' - into money for others.

I think fans going to concerts expect more today in terms of meeting and things. It's cool - I get it because of how the Internet has made things much more personal for fans to follow with Facebook, Twitter and everything - but I also think it's kind of hindering because it takes from the music in a way.

I can think of the number of people who were like, 'I will never get a cellphone because I don't want people calling me all the time. And I will never get on Facebook because I don't want to share that stuff with people. And Twitter, that's not for me.' And this is just the natural progression of things.

Google likely never cared if Google+ 'won' as a competitor to Facebook (though if it did, that would have been a nice bonus). All that mattered, in the end, was whether Plus became the connective tissue between all of Google's formerly scattered services. And in a few short years, it's fair to say it has.

The reason the social-networking phenomenon is something that I invested in early and massively - I led the Series A financing for Friendster; I founded a company called Socialnet in 1997; I founded LinkedIn; and I was part of the first round of financing in Facebook - it sounds trivial, but people matter.

Facebook is not ideologically neutral. In fact, it emerges from a very particular world view which we can trace back to Hobbes. I discovered this by examining the profile of Zuckerberg's fellow board members who, unlike him, are a very interesting bunch and, I suspect, the real power behind the poster boy.

With everybody having a Facebook and a Twitter, I feel like regular people consider themselves stars. It's a live, real-time upload of every time we buy a pair of socks, the most telling sign that we're losing our politeness. When you know everything about somebody, you can talk to them any way you please.

The easiest way to figure out who the customer is in an online space is to figure out who is paying for the thing. Usually, the people paying are the customers. So on Facebook, the people paying are marketers. That makes them the customers. And it means we are the product being delivered to those customers.

'Dependent web' platforms such as Twitter, Facebook, Google and Yahoo are where people go to discover and share new content. Independent sites are the millions of blogs, community and service sites where passionate individuals 'hang out' with like-minded folks. This is where shared content is often created.

I basically use Facebook and Twitter and MySpace to communicate with the fans. I don't think it's necessarily about advancing my career, but I do want to be able to connect with my fans. They are so important to me, and a lot of them have stuck with me since the very beginning, and that means so much to me.

I was involved with MySpace and Facebook and everything at a very young age because it's so casual now, and I'm into texting, obviously. But I've never been involved in any type of chat room. My parents are pretty cautious about it and know all my passwords and know who my friends are and who I'm talking to.

Facebook's data trove is enviable, and its moves into nearly every aspect of our lives - from payment to media, will create even more of it. The company also has created a huge base of developers for its platform, but the ecosystem is incomplete compared to vertically integrated OSes like iOS, Mac or Windows.

The largest issue with search is that we learned about it when the web was young, when the universe was 'complete' - the entire web was searchable! Now our digital lives are utterly fractured - in apps, in walled gardens like Facebook, across clunky interfaces like those in automobiles or Comcast cable boxes.

We Facebook users have been building a treasure lode of big data that government and corporate researchers have been mining to predict and influence what we buy and for whom we vote. We have been handing over to them vast quantities of information about ourselves and our friends, loved ones and acquaintances.

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