In this talk I will explore how Unitarity and Causality strongly constrain the landscape of SU(Nc) theories in the Large-Nc limit. I will show how the space of allowed UV completions of the 2-2 pion-scattering amplitude reduces to a handful of interesting theories. Successively I will add to the picture anomalies, and derive new bounds on the scale where massive higher spin particles must enter. We will comment on various models and see how they saturate the derived bounds.