  Adopting three physically-motivated scales (micro - meso - macro, which refer
to mpc - kpc - Mpc, respectively) is paramount for achieving a unified theory
of multiphase active galactic nuclei feeding and feedback, and it represents a
keystone for astrophysical simulations and observations in the upcoming years.
In order to promote this multi-scale idea, we have decided to adopt an
interdisciplinary approach, exploring the possible conceptual similarities
between supermassive black hole feeding and feedback cycles and the dynamics
occurring in human cancer microenvironment.
