The physical space method of deriving Morawetz-Energy estimates in Kerr, that is robust method which can be  easily  extended to  perturbations of  Kerr, have played an important role  in the proof of the nonlinear stability of slowly rotating Kerr black holes. In this talk, I will discuss a physical space derivation of  global  Morawetz-Energy  estimates for the  scalar  wave equation in a  Kerr spacetime with large angular momentum. Based on joint work with Sergiu Klainerman.