The venerable foundation and the 27-year-old "influencer" aim to instill young people with a concern for what they call the world's "most vulnerable" populations.

The massive online encyclopedia is driven not by a CEO or board but by 250,000 volunteers who rule by democratic consensus and help fund the group.

With an annuity, the percentage the donor receives is determined by his or her age. The older the donor, the higher the ...

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