In celebration of our 5th anniversary, this month we're publishing a series of interviews with innovative leaders about what the next five years hold. To read more about this series, read our editor Nilay Patel's introduction here. Aaron Levie spends more time thinking about the future of work than most. When the 30-year-old entrepreneur co-founded Box, it was as a place for average people to store their files online -- Dropbox before there was Dropbox. But years ahead of Dropbox CEO Drew Houston, Levie saw that the real money in online storage was in the workplace -- and so the company turned to making products that let people collaborate at work.