No woman in the Gilded Age made as much money as Hetty Green. At the time of her death in 1916, she was worth at least 100 million dollars, equal to about 2.5 billion dollars today. Abandoned at birth by her neurotic mother, scorned by her misogynist father, Hetty set out as a child to prove her value. Following the simple rules of her wealthy Quaker father, she successfully invested her money and, along the way, proved to herself that she was wealthy...