This 2-minutes is a must-watch.

Watch this brilliant two-minute video in which Craig Newmark, the founder of Craigslist, retells the story of when he learned he could no longer be a jerk.

At some point, most of us come to this important conclusion, that it is “nice to be nice" and generally much more effective ... it is only too bad it takes some senior leaders so long to do so, as the damage they cause before they get this is frequently significant.

Get this right and watch your leadership effectiveness skyrocket (while you also have so much more fun!)

As always, I welcome all comments, stories and feedback.