A wrinkle in time what is the thing and which historical figures have opposed it?

In "A Wrinkle in Time" by Madeleine L'Engle, "the Thing" refers to a malevolent force known as IT, which represents conformity and the suppression of individuality. Historical figures such as Socrates, Jesus, and Gandhi are cited as opposers of this oppressive force, exemplifying the struggle for free thought and love against tyranny and darkness. Their philosophies and actions highlight the importance of fighting against the forces that seek to control and homogenize humanity.