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Due to [[problems of coordination]], it is difficult for all members of the group to take part in the group process of decision making. Correspondingly, after the group arrived at decisions, there should be some way to make the group follow decisions and accomplish them. For this task, group found out the easiest way to organize them was be select group of leaders, which is generally lead by a single leader. The leader should be the one which is the most wise, to get the best decisions and the best motivator to get the group follow decisions. Yet groups found it is very hard to find such leaders. Leaders learned how to secure their power without the need for the constant consent of the people. Sometimes they are not the wisest, but the more swindler manipulative figures who know who to manipulate information and people to their own needs. (See the [http://en.wikipedia.org/wiki/Principal%E2%80%93agent_problem Principal–agent problem]).