Professor Emeritus of Theoretical Physics at Sapienza University of Rome, research associate at INFN, from 2018 to 2021 President of the Accademia dei Lincei, now Vice President and President of the Class of Physical, Mathematical and Natural Sciences. In 2021 he was awarded the Nobel Prize in Physics for his studies on complex systems. In his scientific career, he has made many decisive and widely recognized contributions in different areas of physics: in particle physics, statistical mechanics, fluid dynamics, condensed matter, and supercomputers.