Barack Obama is an American attorney and politician who served as the 44th president of the United States.
Patrick Collison is the co-founder and CEO of Stripe.
Tim Ferriss is an American entrepreneur, author and podcaster.
Paul Graham is an English-born American computer scientist, entrepreneur, venture capitalist, author, and essayist.
Emma Watson is an English actress, model and activist.
Warren Buffett is the chairman and CEO of Berkshire Hathaway.