Depends on your definition of rags and riches I suppose. By my definition, I know plenty of folks who grew up lower middle class or below, had no exceptional s

Depends on your definition of rags and riches I suppose. By my definition, I know plenty of folks who grew up lower middle class or below, had no exceptional support from parents (many from single parent homes), zero assistance going to college (if they did at all), and otherwise lived lives ranging from unremarkable to living in poverty growing up. I can point to about a 3 or 4 of those types in my personal network who now are multi-millionaires. This is my definition of "made it" - but not many others. If your definition is billionaire, I imagine the list gets a lot smaller.