In this article, I examine Michele Moody-Adams’ critique of the ‘inability thesis’, according to which some cultures make the resources for criticizing injustice ‘unavailable’ to their members. I investigate Moody-Adams’ alternative ‘affected ignorance’ thesis. Using the example of slavery in ancient Greece, I consider two potential candidates for affected ignorance which involve, respectively, ‘unawareness’ and ‘mistaken moral weighing’; in neither, I hold, may one ascribe culpability to those involved.