The Only Leadership Test That Matters

In the introduction to the book, Extreme Ownership, Jocko and I wrote: 

The only meaningful measure for a leader is whether the team succeeds or fails. For all the definitions, descriptions, and characterizations of leaders, there are only two that matter: effective and ineffective. Effective leaders lead successful teams that accomplish their mission and win. Ineffective leaders do not.  

It doesn’t matter that you are working hard. Are you accomplishing the goal? It doesn’t matter that you explained the “why” to your team. Do they understand, and are they executing? It doesn’t matter that you feel you have a good relationship with your boss. Does the boss listen to you and implement your recommendations? Does the boss give you the support and resources you need to be successful?