The following video is part of our "Motley Fool Exclusive Interview" series. In this segment, Fool.com analyst Brendan Byrnes interviews author and Bloomberg reporter Jason Kelly about his recent book The New Tycoons: Inside the Trillion Dollar Private Equity Industry That Owns Everything. 

In just a few decades, private equity firms like Carlyle, Blackstone, Bain, and KKR have managed to grow from relatively small businesses to, in many cases, billion-dollar-plus firms that impact our everyday lives. In the video below, Jason talks about how this happened, and what specifically some of these firms had that set them apart from the rest.