A few weeks ago, I watched The Great Hack on Netflix. I went in expecting a standard tech documentary. I came out genuinely unsettled, not because the information was new to me, but because I realized how little most people around me knew about what had happened. And more importantly, how little they seemed to care.
This is the story of how a company you've probably never heard of, Cambridge Analytica, harvested the personal data of 87 million Facebook users and used it to manipulate elections across the world. And somehow, we just... moved on.
What Actually Happened
In 2014, a Cambridge University researcher named Aleksandr Kogan built a seemingly innocent Facebook quiz app called "thisisyourdigitallife." About 270,000 people downloaded it and took the quiz. Standard stuff, right?
Here's the catch. The app didn't just collect data from the people who took the quiz. It scraped data from all of their Facebook friends too. Every like, every share, every group membership, every photo interaction. Through 270,000 users, the app reached into the profiles of 87 million people, none of whom consented to any of this.
That data was then handed over to Cambridge Analytica, a political consulting firm backed by billionaire Robert Mercer and led by the now-infamous Alexander Nix. The firm claimed they had built psychological profiles containing roughly 5,000 data points on every single American voter.
Let that sink in. Five thousand data points. About you. Collected without your knowledge.
The "Persuadables"
This is the part of the documentary that genuinely disturbed me.
Cambridge Analytica didn't target everyone. They identified a specific category of voters they called "persuadables," meaning people who hadn't made up their minds yet. Using the psychological profiles they'd built, they could figure out exactly what kind of content would push these individuals in a specific direction.
Were you anxious about immigration? You'd see targeted Facebook ads about border crime. Were you disillusioned with the political establishment? You'd see content designed to make you stay home on election day rather than vote for the "wrong" candidate. Were you on the fence about gun control? You'd see stories engineered to trigger a specific emotional response.
This wasn't broad advertising. This was precision manipulation at an individual level. As the documentary puts it, they weren't just selling ads. They were waging a psychological campaign, one voter at a time.
The 2016 Trump presidential campaign paid Cambridge Analytica nearly $6 million for their targeting capabilities. The Ted Cruz campaign used them too. And it wasn't limited to the US. The firm was involved in elections in Trinidad and Tobago, Nigeria, Kenya, and played a role in the Brexit referendum in the UK.
The Whistleblowers
The documentary follows three people, and their stories are what make it compelling rather than just informative.
Brittany Kaiser was a former business development director at Cambridge Analytica. She's a complicated character, as she helped build the machine, profited from it, and then turned . You can question her motives, but the insider details she reveals are damning.
Carole Cadwalladr is the Guardian/Observer journalist who broke the story wide open. Watching her piece together the connections between Facebook, Cambridge Analytica, and political campaigns is genuine investigative journalism at its best. She gave a TED talk about it that's worth watching separately.
David Carroll, a professor at Parsons School of Design, did something simple but powerful: he filed a legal request to get his personal data back from Cambridge Analytica. He wanted to see exactly what they knew about him. The fact that a multi-million dollar company fought tooth and nail to avoid returning one person's data tells you everything about how valuable (and incriminating) that data was.
What Bothers Me the Most
The scandal broke in March 2018. Facebook CEO Mark Zuckerberg was hauled before the US Congress. The FTC fined Facebook $5 billion. Cambridge Analytica filed for bankruptcy in May 2018. The UK's Information Commissioner's Office hit them with fines too.
And then... nothing. We all went back to scrolling.
That's what bothers me. Not that the scandal happened; power will always find ways to exploit systems. What bothers me is how quickly and thoroughly we collectively shrugged it off.
Think about this:
- Facebook is still collecting your data. The business model hasn't fundamentally changed. They renamed the company to Meta, sure. But the core revenue engine, harvesting user behavior to sell targeted advertising, is identical.
- The techniques Cambridge Analytica pioneered are still in use. The company is dead. The methods are not. Political campaigns globally still use and . They've just gotten better at hiding it.
- We still accept terms and conditions without reading them. We still give apps access to our contacts, location, photos, and browsing history without a second thought. We know it's happening, and we've decided it's the price of convenience.
Why People Didn't Talk About It
I have a few theories on why this documentary and this scandal didn't stay in public consciousness the way it should have.
It's abstract. Nobody can see their data being harvested. There's no break-in. No theft you can point to. If someone stole your wallet, you'd be outraged. But when someone builds a psychological profile of you using your Facebook likes? It doesn't feel like a violation, even though it arguably is a bigger one.
It's uncomfortable. The documentary forces you to confront an unpleasant possibility: that your opinions, your votes, maybe even your identity might have been influenced by you never knew existed. Nobody wants to believe they were manipulated. It's much easier to dismiss the whole thing as overblown.
It requires systemic thinking. Understanding the scandal requires connecting dots between data science, political consulting, social media platform architecture, and electoral regulations across multiple countries. Most news coverage reduced it to "Facebook bad" or "privacy matters," which missed the actual depth of what happened.
Why You Should Watch It
If you haven't watched The Great Hack, do it this weekend. Not because it'll make you delete Facebook (though it might). Watch it because it fundamentally changes how you think about the information you consume online.
Every time you see a political ad on Instagram, every time YouTube recommends a "suggested" video that happens to align with your existing worldview, every time your feed seems eerily in sync with what you were just thinking about, that's not coincidence. That's the system working as designed.
We live in an era where data is the most valuable resource on the planet, more valuable than oil as The Economist famously put it back in 2017. And unlike oil, we hand it over willingly. Every day. Every scroll. Every like.
The least we can do is understand what's being done with it.
The Great Hack is available on Netflix. Directed by Karim Amer and Jehane Noujaim. Released in 2019.