This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
For the sleeper ships of 20th century Earth, it was the standard practice for the leader to be revived first. This would give them the time to make a decision on whether the conditions warranted the revival of the others. (TOS: "Space Seed")
When the transporter duplicated Captain James T. Kirk in 2266, Lieutenant Commander Spock had the rare opportunity of appraising the Human mind, or the roles of good and evil in a man. An exceptional leader, as noted by Spock, was strong because of their evil, or negative, side. When properly controlled and disciplined, this side, with its hostility, lust, and violence, gave strength to a leader. With the negative side removed, the good, or positive, side of Kirk found the ability. (TOS: "The Enemy Within")
In 2268, upon learning that Captain James T. Kirk wished to speak with those in charge of the Eymorg, Kara asked the question, "In charge?", indicating that she did not understand the meaning of this phrase. In explanation, Kirk replied, "Yes, the organizers, the managers. The leader of your people." (TOS: "Spock's Brain")