Keynote by Sally Haslanger (MIT) on ideal vs. non-ideal social ontology. Opening lecture of the Social Ontology conference in Boston at Tufts University, on August 22, 2018. Introduction by Brian Epstein (Tufts). ISOS: Homepage: https://twitter.com/ISOSonline Twitter: https://isosonline.org/ Journal: https://www.degruyter.com/view/j/jso