The creature IT is the disembodied brain that controls the people of Camazotz in A Wrinkle in Time. IT’s goal is to control everyone on the planet in order to ensure absolute conformity. It is not a benevolent creature. Charles Wallace tells Meg that IT sometimes calls itself “the happiest Sadist” (p. 135). A sadist (pronounced by some people as sad-ist) is a person who enjoys causing pain in others. Charles Wallace explains IT’s purpose to Meg.
Why do you think we have wars at home? Why do you think people get confused and unhappy? Because they all live their own, separate, individual lives. I’ve been trying to explain to you in the simplest possible way that on Camazotz individuals have been done away with. (p. 135)
In this way, there is no war or unhappiness, but the people also do not think for themselves. They do not really exist as separate, independent identities. We see this through the character of Charles Wallace, who’s “arrogance causes him to become a robot-like slave to IT” (enotes, themes and characters). Meg, as you can see, wants nothing to do with it.
For more, read here: http://www.enotes.com/wrinkle-time/themes-characters
Dictionary.com. "Sadist." Dictionary.com. Dictionary.com. Web. 16 May 2012. <http://dictionary.reference.com/browse/sadist>.
Enotes. "A Wrinkle in Time." Enotes.com. Enotes.com. Web. 16 May 2012. <http://www.enotes.com/wrinkle-time/themes-characters>.