When you're under 40, buying a life insurance policy may seem about as practical as buying a Humvee, and financial planning often means making sure next month's rent is covered. As a result, a vast number of young adults are facing an uncertain financial future. We teamed up with MassMutual to design a service that could impart the wisdom of long-term thinking to a demographic that lives in the present. Together, we created a master's program for adulthood that covers everything from investing in a 401(k) to choosing good, cheap wine. We called it Society of Grownups.