Sheryl Sandberg returned to her alma mater to deliver the Senior Class Day address at Harvard in May 2014, the same year her bestselling book 'Lean In' was reshaping conversations about women in the workplace. Standing before the graduating class in Harvard Yard, she reflected on how unpredictable her own path had been. Sandberg told the graduates that when she was sitting where they were, she could never have predicted Facebook — because there was no Internet yet, and Mark Zuckerberg was in elementary school, 'already wearing his hoodie.' The point wasn't that planning was useless, but that rigid planning was dangerous. If you draw a straight line from Point A to Point B, you become blind to the unexpected detours that might lead somewhere far more interesting. The Internet itself was one of those detours — and anyone who had been too focused on their predetermined path would have missed it entirely.