Institutions are based on the norms of society and a list of rules, restricting the free thought of people. This is against everything a leader stands for. Leadership has many elements to it, but they are all interrelated and affect one another. In today's quantum world, we have a broad sense of the idea of leadership, and it is unique for each individual. Some people may consider someone a leader who others do not consider a leader.
Leaders are everywhere, everyday, all over the world.
Leaders can be anyone, from anywhere, at anytime. They can be the President or they can be the garbageman. It does not matter where you fit into society. It is really up to them how they want to lead and what it is they are trying to accomplish. Other people are important because without followers, there could be no leaders.