More than two generations ago, the venture capital community - VCs, business angels, incubators and others - convinced the entrepreneurial world that writing business plans and raising venture capital constituted the twin centerpieces of entrepreneurial endeavor. They did so for good reasons: the sometimes astonishing returns they've delivered to their investors and the astonishingly large companies that their ecosystem has created.

But the vast majority of fast-growing companies never take any venture capital. So where does the money come from to...