100BILLION

Here's a quote from the "Radical Evolution" book though not actually the authors quote:

'I decline to accept the end of man...I believe that man will not merely endure: he will prevail. He is immortal, not because he alone among creatures has an inexhaustible voice, but because he has a soul' - William Faulkner, Nobel Prize acceptence speech, 1950

Also one from the author:

'..care about what it means to be human, what it means to have relationships, what it means to live life, to have loves, or tell lies' - Joel Garreau - Radical Evolution, 2004, p4

And another from the book but a different person:

'We are as gods and might as well get good at it' - Stewart Brand, The whole Earth Catalog, 1968