 Green is the first systematic treatment of elastic-plastic materials undergoing large deformations.Over the next two decades, Naghdi continued to work on important aspects of plasticity, and in 1990, thirty years after the publication of his review article on infinitesimal plasticity, he offered an even finer critical account of the modern theory.After his long career for over three decades as a professor in the Department of Mechanical Engineering, he succumbed to lung cancer at his home in Berkeley, California.