There are many definitions of leadership.
However, at its simplest, leaders are those who influence others to do what they would not otherwise do on their own.
Leadership, like money, is amoral. It can be good or bad. Leaders can influence others to righteousness or wickedness, charity or theft.
A leader can influence people from a position of authority over them, from walking along beside them or from serving them. Consequently, to be a leader you don’t have to be a dynamic charismatic personality who is out in front showing people where to go. You do, however, have to be willing to be an influencer. Jesus described it as being like salt and light (Matt. 5:13-16).
God uses leaders because people, on their own, are reluctant to do what they should do.
God uses leaders so people will fulfill their destiny.
That is why Christians need to be part of a community of leaders (i.e. believers). That is why the world needs Christians. GS