Long Time Silicon Valley journalist John Markoff unearths the roots of a tree, whose branches include, among others, Ken Kesey, Steve Jobs, and Elon Musk. Markoff’s new book, “Whole Earth: The Many Lives of Stewart Brand,” examines a Zelig-like character in both California’s 1960s counterculture and the ethos of Silicon Valley. Brand’s Whole Earth Catalog remains a cultural bible, from which we are still singing hymns.