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But if her name doesn’t ring a bell, trust us, you’re missing out. With just shy of 3 million followers on LinkedIn, and many more across the 2,500 advice articles she has published in Forbes, Ryan happens to be among the most-read career experts in the world. That’s right: 3 million followers—roughly the population of Chicago! This puts her among a small, powerful group of influencers on LinkedIn, many of whom command enormous followings, and whose word is often taken as career gospel.

Historically, the voices of American business—the business and career experts who have landed lucrative speaking tours and book deals—have been a hodgepodge of CEOs, founders, academics, and talking heads. The reality today is much different: Most top influencers on LinkedIn have never run a large-scale business, managed a significant number of employees, or conducted research on workplace topics, let alone been chosen by a board of directors to helm a multinational. They might have dropped out of the corporate world years ago, or never entered it in the first place. If you read their bios, in fact, one common denominator is their lack of experience in corporate channels, alongside phrases like “15 years experience” in the bio of a 28-year-old.

To be sure, the professional world benefits from an influx of thoughtful and diverse perspectives. And this is exactly what these high-powered but mild-mannered influencers offer. But if you dig into their résumés, it’s usually not apparent how they managed to climb to the top. With so many followers, they wield a megaphone that’s among the most powerful in social media. Anyone who ever slogged through writing LinkedIn posts without attracting more than three likes has to envy these influencers. Inevitably, the questions race through your mind: Who are these people? Whats their secret to so many followers? “I’m equal parts inspired, impressed, and—OK, fine—a little envious,” says Justin Belmont, CEO of marketing agency Prose Media in New York. “Do I want to be them? Who doesn’t?”