Richard T. W. Arthur is Professor Emeritus at McMaster University, living in Toronto. Specializing in early modern natural philosophy, mathematics, and the foundations of physics, he has taught at universities in Canada, Nigeria, the United States, Italy, and Britain. He has authored about 80 articles and eight books, including Monads, Composition, and Force (OUP, 2018), The Reality of Time Flow (2019), and Leibniz on Time, Space, and Relativity (OUP, 2021), and is currently finishing two other co-authored books, on Leibniz on the foundations of the calculus, and on Bertrand Russell's engagement with Leibniz's philosophy.
Osvaldo Ottaviani is currently a Postdoctoral Researcher (Radboud Excellence Initiative Fellowship) at the Radboud University of Nijmegen. His main interests are in the history of early modern philosophy and science. His PhD dissertation (2018) has been awarded with the VGL Dissertation Theses Award for Outstanding PhD Theses on Leibniz (Leibniz Gesellschaft, 2023). He had research positions at the University of Münster, Milano, and the Israel Institute of Technology. He published several papers on various aspects of Leibniz's philosophy, including the edition and translation of some of Leibniz's unpublished manuscripts. He is also working on a book on Leibniz's theory of existence and the development of his metaphysics of possible worlds.