Rebuilding a healthy and harmonious relationship with Nature, addressing the issue of population growth, coming to terms with problems related to energy resources, and ending conflicts that destroy entire peoples and ecosystems. These are topics that over the last thirty years have been addressed repeatedly from many points of view, and in Aurelio Peccei they found a true forerunner. Founder of the Club of Rome and promoter of the famous report entitled The Limits to Growth, he addressed many issues together with SGI President Daisaku Ikeda that still demand our attention today, even with greater urgency. The task that the two authors undertook was burdensome, especially due to the obvious difficulty of "singing out of tune," that is, trying to stimulate a major international debate on topics that few were willing to question. But it is precisely in this that the caliber of great protagonists is recognized, as they become bearers of messages that transcend the present moment and push us to build a clear vision of the future.