Fabio Capitanio is one of the brightest and most dedicated young scientists. His work combines geology, plate reconstruction, numerical models, and basic physics. He has developed a powerful description of the processes underlying plate tectonic motions that greatly enhances our view of the way Earth works. His recent work models convergent margins at high resolution in three dimensions, including deforming overriding plates, buoyancy variations in the slab, melt generation, and the effect of surface processes. These models are an order of magnitude more advanced than their immediate predecessors, are well resolved, and provoke new understanding of the distribution and evolution of forces in subduction systems. Fabio's work draws out the simplicity inherent in a complicated system.