The 21 Indispensable Qualities of a Leader

I'm curious whether these qualities emerged from personal experience, research, or observations of successful leaders. What do you think led to this specific list?

Some traits seem straightforward, but putting them into action can be tough. Has anyone tried to implement these qualities at work and seen real change?

The sequence feels intentional, guiding the reader through a path of growth. I'm wondering if the author planned it that way or if it evolved during writing.