This document discusses the roles of human resources (HR) in addressing digital disruption. It identifies four key roles: the Rainmaker, who governs digital transformation initiatives; the Breeder, who ensures the organization has the necessary competencies; the Layer, who creates a new digital HR platform; and the Mutant, who digitally empowers HR. It then provides more details on each role, including how the Rainmaker can take different approaches to managing digital initiatives, how the Breeder must transform work in response to changing human needs and the future of work, how the Mutant must develop new digital skills, and how the Layer can position HR as a platform within the organization.