This issue of H.M. brings together contributions from the conference held in Florence in June 2023. On that occasion, distinguished scholars gathered to commemorate what would have been the 80th birthday of Paolo Parrini, reflecting on his enduring philosophical legacy and the key research themes that defined his career. Alongside the many contributions from that event, additional essays were later included by those who wished to pay tribute to Parrini’s philosophy through their own reflections. The result is a collective volume, where voices from diverse philosophical backgrounds and generations come together to acknowledge the significance of Paolo Parrini’s work—not merely by celebrating his substantial scientific achievements, but by engaging with his ideas in the spirit of rational dialogue, a hallmark of his intellectual approach.