Charles Fracchia is passionate about San Francisco's history. A lifelong resident of the city, he's published three books about it, including his latest, When the Water Came Up to Montgomery Street: San Francisco During the Gold Rush. He's also the founder and president emeritus of the SF Historical Society, and was one of the founders of Rolling Stone magazine. In his new book, the first ever to focus entirely on how the Gold Rush impacted SF, he theorizes that San Francisco's "instant city" development during the gold craze may be responsible for its culture of tolerance and inclusiveness today.