This story is part of the New Boom series on millennials in America.
Millennials are spending — and giving away their cash — a lot differently than previous generations, and that's changing the game for giving, and for the charities that depend on it.
Scott Harrison's group, Charity: Water, is a prime example. Harrison's story starts in New York's hottest nightclubs, promoting the proverbial "models and bottles."
"At 28 years old, I realized my legacy was going to be just that.