Sean Parker found massive success at an incredibly young age.
At 19, he cofounded Napster, a file-sharing service that would change how the world consumes music.
By 24, he was the founding president of Facebook, a tiny startup that would go on to become the biggest social network in the world.
The 41-year-old, whose net worth is estimated to be about $2.7 billion, hasn't slowed a bit: he donates millions to philanthropic causes — and political ones — and lives an expensive lifestyle.
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Here's how Parker got his start, ended up at Facebook, and became a billionaire.
Madeline Stone contributed to an earlier version of this story.
