Standing on the grand staircase of Lynda and Stewart Resnick's opulent Beverly Hills mansion at a party last fall — where Diane Keaton, Bob Iger and Brian Grazer were among the luminaries making small talk over crudités and Sazerac cocktails — the author Walter Isaacson took a moment to thank his hosts. Not only were the Resnicks giving the party to celebrate his new biography of Elon Musk, they had also been major supporters of his former professional home, the Aspen Institute, donating $36 million to the think tank over the years. Isaacson was not the only one in the room with reason to be grateful to them. Overall, the Resnicks — whose Wonderful Company business empire includes Pom Wonderful pomegranate juice, Wonderful Pistachios, Fiji Water, Halos mandarins and Teleflora, the flower-delivery service — have donated $1.9 billion of their estimated $13 billion fortune to academic institutions, climate change initiatives, cultural organizations and programs in California’s Central Valley. Their gifts have landed them on the Chronicle of Philanthropy’s annual list of the 50 biggest donors three times.

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Persons: Stewart, Diane Keaton, Bob Iger, Brian Grazer, Walter Isaacson, Elon Musk, Isaacson, Picasso, Fragonard, Boucher, Michael Govan, Ann Philbin, Michael Milken Organizations: Aspen Institute, Angeles County Museum of Art, Milken Institute, Wonderful Company Locations: Beverly, Fiji, Central Valley