The debate between individualism and generalism (qualitativism) concerns the status of individualistic facts and their relations with qualitative facts. It is argued that a proper definition of individualistic facts should be a modal one, and moreover that it requires the assumption of haecceitism for its adequacy, contrary to the common belief. Consequently, the positions of individualism and generalism are dependent upon the more fundamental stances of haecceitism and anti-haecceitism in the metaphysics of modality de re.