Giorgio Parisi is a Professor of Physics at the Università degli Studi di Roma 'La Sapienza', Italy. His research is broadly focused on theoretical physics; from particle physics to glassy systems. He has been the recipient of numerous awards, including the Boltzmann Medal, the Enrico Fermi Prize, the Max Planck Medal, the Lars Onsager Prize and an ERC advanced grant. He is president of the Accademia dei Lincei and a member of the collaboration 'Cracking the glass problem', funded by the Simons Foundation. Pierfrancesco Urbani is a CNRS researcher. His research activity focuses on statistical physics of disordered and glassy systems. After a joint Ph.D. between Sapienza University of Rome, Italy and Université Paris-Sud, France, he joined the Institut de Physique Théorique of CEA, first as a post-doctoral researcher and then as a permanent researcher. Francesco Zamponi is a Centre national de la recherche scientifique (CNRS) Research Director and an Associated Professor at Ecole Normale Supérieure, Paris. His research is broadly focused on complex systems, ranging from glasses to agent-based models for macroeconomy. He has been awarded an ERC consolidator research grant and he is a member of the collaboration 'Cracking the glass problem' funded by the Simons Foundation.