Katie Barclay is a EURIAS Fellow at AIAS, Aarhus Universitet, and a Senior Research Fellow at The University of Adelaide. She is an historian of family life, gender and emotion, and has published widely in these areas. Her publications include: Love, Intimacy and Power: Marriage and Patriarchy in Scotland, 1650–1850 (Manchester University Press, 2011); Emotion, Ritual and Power in Europe, 1200–1920: Family, State and Church (Palgrave Macmillan, 2017), edited with Merridee Bailey; and Death, Emotion and Childhood in Premodern Europe (Palgrave Macmillan, 2016), edited with Kimberley Reynolds and Ciara Rawnsley. She is co-editor of Emotions: History, Culture, Society, and is currently completing a monograph on how to understand the collective emotions of eighteenth-century lower order Scots. This paper, ‘Precarious Emotions: Quantification, Big Data and the History of Emotions’ was delivered as a keynote lecture at a conference on ‘The Future of Emotions: Conversations without Borders’ at The University of Western Australia in June 2018.