Positive change begins on the inside. If you want different results, it's never about magic, luck, or throwing things at the wall and hoping it sticks. You have to begin with your way of thinking. You have to start with behaviors.
It is normal in our world to be negative. As humans, we naturally make quick judgments to save our skin. For much of history, this was necessary for survival, but negativity isolates us from others when leading. This isolation is the antithesis of leadership. Part of being a leader is attracting others and drawing out the best each member has to offer.
Negativity is not leadership.