“…A discussion of whether Delboeuf’s mechanism is compatible with the advances of 20th-century physics requires a study all its own, however, and will not be undertaken here. I would only note that the nature of time is the subject of lively debate and speculation among contemporary physicists and philosophers, from those who see it as a relational phenomenon of change, similar to how Delboeuf saw it, to others who believe the whole history of the universe, its past, present, and future, is fused into a single, timeless reality, and our experience of the passing of time—and of free will—is consequently an illusion (Barbour, 1999, 2015; Callender, 2010; Carroll, 2010; Smolin, 2013, 2015). The same applies for inertia.…”