In her new book, Bad Company: Private Equity and the Death of the American Dream, journalist and WIRED alum Megan Greenwell chronicles the devastating impacts of one of the most powerful yet poorly understood forces in modern American capitalism. Flush with cash, largely unregulated, and relentlessly focused on profit, private equity firms have quietly reshaped the US economy, taking over large chunks of industries ranging from health care to retail"often leaving financial ruin in their wake. Twelve million people in the US now work for companies owned by private equity, Greenwell writes, or about 8 percent of the total employed population. It is very hard for private equity firms to lose money on deals. They're getting a 2 percent management fee, even if they're running the company into the ground. They're also able to pull off all these tricks, like selling off the company's real estate and then charging the company rent on the same land it used to own. When private equity firms take out loans to buy companies, the debt from those loans is assigned not to the private equity firm but to the portfolio company. It is just not about improving the company at all. It is about, how do we extract money? There was a huge expansion of private equity in the 2010s for the same reason that venture capital exploded: There was a lot of cheap money out there, and cheap money is great for investors.