The Michigan-based Arcus Foundation, founded and presided over by billionaire heir Stryker (he made the Forbes “World’s Billionaires” list this year), has an unusual twofold mission: gays and apes. Its 2007 grants to the Gay & Lesbian Fund, supporting social justice organizations, topped $11.8 million, and the Great Apes Fund, which supports the survival of great apes and their habitats, doled out nearly $4.16 million.