When a massive wildfire destroyed more than a thousand homes last year in the bone-dry hills of drought-stricken Lake County, California, about two hours north of San Francisco, Magdalena Valderrama Hurwitz and her husband Eliot were among those made homeless. Eager to transform their tragedy into an opportunity, they got together with a group of neighbors who had also lost their homes and began imagining a different kind of community. Hurwitz, a former non-profit administrator…