Over the last decade or so, Steve has given more than one hundred public presentations.  These include keynote addresses at conferences in Australia, Austria, Chile, France, Italy, the Netherlands, Norway, Romania, Spain, Sweden, Switzerland, the United Kingdom and the United States, as well as invited talks at numerous universities, including Australian National University, Cambridge University, Harvard University, Oxford University, Princeton University, Stanford University, University of Chicago, University of Edinburgh, University of Graz, University of Notre Dame, University of Oslo, University of Sydney, University of Utrecht, and University of Vienna.

In 2021, Steve presented the Academy Lecture for Humanities and Social Sciences at the Norwegian Academy of Science and Letters, and the Alan Saunders Lecture in Public Ethics at the Australasian Association for Philosophy, which was broadcast nationally by Australian Public Radio. He also gave the ExPhil Lecture at the University of Oslo, and the Bodaken Lecture at Colorado State University. He presented papers at various other venues, including Edinburgh, Exeter, Graz, Reading, Pisa, Princeton, and Stockholm.

In 2022 & 2023, Steve gave a keynote address at the North American Society for Social Philosophy, and endowed lectures at Lehigh University, St. Norbert College, University of Maine, and University of Maryland-Baltimore County. In the US, he presented invited talks at Harvard University (twice), Illinois Institute of Technology, Texas A&M University, and the University of Tennessee. Internationally, he gave presentations (some online) at the British Institute of International and Comparative Law (UK), Concordia University (Canada), Friedrich-Alexander Universität (Germany), Hannover University (Germany), Hong Kong Catastrophic Risk Centre (China), the Institute for Future Studies (Sweden), Karlsruhe University (Germany), Oxford University (UK), University of Auckland (NZ), University of Canterbury (NZ), University of Exeter (UK), and University of Newcastle (UK).