“The Peace of God: Demotic Religiosity and the Millennial Dynamics of the Central Middle Ages,” in Religion and Peace, ed. Yvonne Friedman (London: Taylor and Francis, 2017), pp. 44-66.
“Millenarianism/Millennialism,” Vocabulary for the Study of Religion, ed. Kocku van Stukrad and Robert Segal (Leiden: Brill, 2015), vol. 2, pp. 430-440.
“Millenarianism/Millennialism, Eschatology, Apocalypticism, Utopianism,” Handbook of Medieval Culture, ed. Albrecht Classen (Berlin: De Gruyter, 2015), vol 2, pp. 1093-1112.
“Preface: On Millennial Studies, Vesperian Scholars, and the Millennial Clashes of the Twenty-First Century,” in Beyond the End: The Future of Millennial Studies, ed. Jonathan Searle and Kevin Newport (Sheffield: Phoenix Press, 2012), pp. vii-xxii.
“Roosters Crow, Owls Hoot: On the Dynamics of Apocalyptic Millennialism,” in War in Heaven, Heaven on Earth: Theories of the Apocalyptic, ed. Glen S. McGhee & Stephen O’Leary (Equinox Press, London, 2005), pp. 19-46.
“The Fruitful Error: Reconsidering Millennial Enthusiasm,” Journal of Interdisciplinary History 32:1 (2001), 89-98