A.M. (1993) and Ph.D. (1998), Princeton University.  Didier specializes in ancient and middle-period Chinese intellectual history, philosophy, and religion.  His work is interdisciplinary, involving the various fields of anthropology, archaeoastronomy, archaeology, art history, history of science and technology, literary analysis, linguistics, philosophy (alchemy, metaphysics, cosmography, cosmology, ontology, epistemology, self-cultivation), and religion.  His major publications include "In and Outside the Square: The Sky and the Power of Belief in Ancient China and the World, c. 4500 BC – AD 200" (Sino-Platonic Papers No. 192, 2009, 3 vols.: www.sino-platonic.org), ⟪气候改变历史⟫ ("A History of Climate Change"; co-edited with Wang Xiaoran; in Chinese; Beijing: Jincheng, 2014), ⟪再議中國古代和帝國早期宇宙觀中的‘地方’說⟫ (“Reassessing the Square-Earth Thesis in Classical and Early-Imperial Chinese Cosmography”; in Chinese; Taipei: Lianjing, 2009), and “Messrs. T’an, Chancellor Sung, and the Book of Transformation (Hua Shu): Texts and the Transformation of Traditions” (Asia Major, New Series; Nangang, Taiwan: Academia Sinica, 1998).  At CSU Didier has served as Associate Dean of the College of Liberal Arts (2007-2012), the start-up Center Director (CEO, CFO, COO) of the INTO Colorado State University International Student Center, LLC (2012-2014), and Chair of the Department of Philosophy (2014-2019).  He is currently preparing for publication two book manuscripts, including (1) a thorough account of classical (c. 5th-1st century BC) Chinese metaphysics, and (2) an annotated translation of a seminal 10th-century syncretic work of Daoist-alchemical-immortalist, Buddhist, Confucian, and Mohist philosophies, the Hua Shu 化書 (“Book of Transformation”).