Why do oppressive social and political systems persist for as long as they do? Critical theorists posit that the oppressed are in the grip of ideology or false consciousness, leading them voluntarily to accept their servitude. An objection to this explanation points out that we have no account of how the ruling class’s ideology comes to dominate. One common reply says that the ruling class’s ideology comes to dominate because they control major organizations such as schools, churches, and news agencies. This response is seriously flawed, I argue. I then explore an alternative, neglected answer: The ruling class’s ideology dominates because believing it is good for the oppressed. After sketching some details, I explore the implications of this account for critical theory as a research program.