Agreed. 'courage' and 'vision' aren't all that are needed. However, I've talked to enough people over the years to realize when even those are missing. Absent those, you'll never even get close to the doing. Sometimes the 'doing' part hasn't happened enough simply because people are overwhelmed with too many things to do and not enough time. If that's really all that's missing, but the other parts are in place, I'm more inclined to get involved (although still, I rarely do).