Belief is a magical thing and if you are sure of what you're saying with zero doubt then this can take you so much further than all the talent in the world!!

This is not a talent issue or a tactical issue, this is something that almost all teams have an issue with at some point and it shouldn't have been this hard to fix.

Ok so this one was a little bit difficult for me and I suppose a bit of a sensitive subject.
I talk about my mental health, my adoption, my ADHD, my DID and I suppose it does all get a little bit dark at times.

Do you have what it takes to become a leader?
No, really???
Do you believe in yourself and do you have enough charisma to sell yourself OR something that people want?

And can you delay gratification?  Are you patient and disciplined?

Why do most businesses send their managers on leadership courses when they don't really know what leaders are??

There is a difference between self worth and confidence.  There is also another one to throw in there which is how secure you are as a person (lack of ego).
This topic needs to be made very clear as they are all so different and each can cause their own set of issues!!!

Do you have self confidence?
Do you identify as your role?
WHO ARE YOU?
These are questions you need to know.

A look at Thinking Fast and Slow by Daniel Kahneman and how it relates to leadership.  
Also do some people live in 3rd person and are aware of their own thoughts and see them as not them but like a teleprompter???

A little look at the book by Dr Robert Glover and the issue within marriages of the "Nice Guy Syndrome" and how this could kind of link into leadership.

A review of a paper that reviewed the book "The Extraordinary Leader".
The paper ' The Remarkably Ordinary Leader' was by Jim Di Piante and written in 2009.
The original book was called 'The Extraordinary Leader' and was written by John Zenger & Joseph Folkman in 2002.