We often think of disruption as this mythical struggle of David and Goliath — the scrappy start-ups rising out of nowhere to take down the established players, who are as powerful as they are out-of-touch.In business, as in life, people tend to root for the Davids... and I’m not always sure why.As much as we like to hate The Man — whether it’s BP, KPMG, or the Big G himself — there are consequences to stickin’ it to him... Here’s the thing: Goliath’s fall would look a lot different if your empire falls with him. Whether they’ve been in power for 2 years or 200 — how can Goliaths keep the spirit of David alive, and disrupt themselves before someone else does it for them?Today we're turning our attention to the big guys, and taking notes from the leaders who broke rank to ignite the coup from within the castle walls.