Warren Hellman as a child. During World War II, when his father was sent overseas, Hellman moved to the Central Valley, near Vacaville, with his mother, Ruth Koshland Hellman, and his sister, Nancy.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> A young Warren Hellman on horseback in front of the pyramids. His practice of escaping for long rides so unnerved his mother that she enrolled him in the San Rafael Military Academy to give him discipline.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> After his graduation in 1955 from the University of California, Berkeley, Warren Hellman served two years in the U.S. Army, stationed in Germany, before enrolling at Harvard Business School<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> A young Warren Hellman plays the banjo. Frustrated with how slowly he was learning, Hellman once tried to convince the folk legend Pete Seeger to give him banjo lessons. He was rejected.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren and Chris Hellman on their wedding day. Hellman met Chris, a former ballet dancer, on the deck of the Queen Elizabeth, in what his daughter, Dr. Tricia Hellman Gibbs, described as “the most romantic story ever.”<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren and Chris Hellman on their wedding day. In recent years, Hellman cared for Chris as she suffered from Alzheimer’s disease. “He still sees her as the beautiful dancer he met on the deck of the Queen Elizabeth,” their daughter, Tricia, said.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman plays banjo while his daughter, Tricia, plays guitar. Dr. Tricia Hellman Gibbs is now a former member of the U.S. ski team and the founder, along with her husband Richard Gibbs, of the San Francisco Free Clinic.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman plays the banjo with his son, Mick. Mick is now an investor at Hellman & Friedman LLC, the private equity firm his father launched in 1984. The company has raised more than $25 billion in capital.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman, president of the Mills College board of trustees, standing in his office in July 1990; he voted to make Mills a co-educational school by August 1991<span class='em small'><br/>Credit: John Storey/Time Life Pictures/Getty Images</span> Warren Hellman of the Wronglers performs as part of Hardly Strictly Bluegrass 10 in Golden Gate Park on Oct. 2, 2010 in San Francisco<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman introduces Emmylou Harris as part of Hardly Strictly Bluegrass 8 at Speedway Meadow in Golden Gate Park on Oct. 5, 2008 in San Francisco<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman, avid horseman, was a five-time age group national champion in ride and tie, a combination of cross-country running and endurance horseback riding<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman at Burning Man. Hellman went to the desert art festival for the first time to celebrate his 70th birthday. He liked it so much that he went back the next year.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman, left, Heidi Clare and Jimmie Dale Gilmore, right, of Jimmie Dale Gilmore & the Wronglers perform during the 12th annual Americana Music festival on Oct. 12, 2011 in Nashville, Tenn.<span class='em small'><br/>Credit: Beth Gwinn/Getty Images</span> Warren Hellman, founder of the Strictly Bluegrass Festival, pictured Oct. 5, 2003, gave free admission to 40,000 Bay Area bluegrass music fans<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman of the Wronglers performs during the 12th annual Americana Music festival at on Oct. 12, 2011 in Nashville, Tenn.<span class='em small'><br/>Credit: Beth Gwinn/Getty Images</span> Warren Hellman and family attend the Hardly Strictly Bluegrass Festival in Golden Gate Park on Oct. 1, 2011 in San Francisco<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman addresses the crowd during day 3 of the Hardly Strictly Bluegrass Festival in Golden Gate Park on Oct. 5, 2008, in San Francisco<span class='em small'><br/>Credit: C Flanigan/FilmMagic</span> Warren Hellman and family attend the Hardly Strictly Bluegrass Festival in Golden Gate Park on Oct. 1, 2011 in San Francisco<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman and family attend the Hardly Strictly Bluegrass Festival in Golden Gate Park on Oct. 1, 2011 in San Francisco<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman speaks at the Hardly Strictly Bluegrass festival in Golden Gate Park in San Francisco on Oct. 3, 2009<span class='em small'><br/>Credit: Larry Hulst/Michael Ochs Archives/Getty Images</span> Mayor Ed Lee presenting the flag of San Francisco to Warren Hellman at the Hardly Strictly Bluegrass festival in Golden Gate Park in San Francisco, on Oct. 1, 2011<span class='em small'><br/>Credit: Larry Hulst/Michael Ochs Archives/Getty Images</span> Chris Hellman, Warren Hellman, and Mayor Ed Lee attend the Hardly Strictly Bluegrass Festival in Golden Gate Park on Oct. 1, 2011 in San Francisco<span class='em small'><br/>Credit: Tim Mosenfelder/Getty Images</span> Warren Hellman, at right, attends an election night party for Proposition C. To his left, Steve Falk and Tim Paulson<span class='em small'><br/>Credit: Adithya Sambamurthy/The Bay Citizen</span> Warren Hellman, center, with his wife, Chris, right, and musician Hazel Dickens<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman, second from right, outside the Dunsmuir Hellman Estate in Oakland, where he spent summers with his grandmother. His first cousins, Katherine Hellman Black and Frances Green, are on the left, and his sister, Nancy Bechtle, is on the right.<span class='em small'><br/>Credit: Courtesy of the Hellman family</span> Warren Hellman, right, with Nate Levine, a member of Hellman's bluegrass band, the Wronglers<span class='em small'><br/>Credit: Courtesy of the Hellman family</span>