Dennis P. O’Hara is the former director of the Elliott Allen Institute for Theology and Ecology at the University of St. Michael’s College and Emeritus professor of eco-theology at the University of Toronto. Based on Thomas Berry’s cosmology, he has been actively involved in exploring eco-theology and eco-spirituality in response to the current climate disaster. O’Hara has spoken at professional and academic gatherings in Canada, the United States, Europe, and Korea, on the Laudato Si', eco-theology, and eco-spirituality.