Explore a 38-minute conference talk from the Workshop on "Non-regular Spacetime Geometry" at the Erwin Schrödinger International Institute for Mathematics and Physics. Delve into the consequences of the recent non-smooth/synthetic definition of timelike Ricci curvature bounded below and dimension bounded above in Lorentzian synthetic spaces. Learn about the general setting and basic properties before focusing on a general isoperimetric inequality. Gain insights from Fabio Cavalletti's presentation, based on joint projects with A. Mondino, as part of the cutting-edge research in non-regular spacetime geometry.