The emerging picture of light ion collisions

Light ion collisions, including O+O and Ne+Ne, at RHIC and the LHC, provide a unique scientific opportunity to understand the interplay between the two major paradigms which describe heavy-ion collisions: collective hydrodynamic flow in response to initial state geometry, and the significant modification of hard-scattered parton showers from interactions with the Quark Gluon Plasma medium. This talk gives an overview of the emerging experimental and theoretical pictures of symmetric light ion collisions at RHIC and the LHC, their comparison and contrast to small asymmetric systems like p+A (where the paradigm appears broken) and large A+A systems, and the prospects for further key measurements and future light ion running.