 In order to combat and change the institutional paradigm, Wolfensberger and allies developed and adapted human service planning concepts and broader change agentry strategies.According to O’Brien (2011), Wolfensberger  consulted the social change and leadership literature and began to form and test in action his theories of what he called “change agentry.” At the time, the term “change agentry” was somewhat unusual.Wolfensberger (2012) notes that it evolved from “change agent,” probably in the 1950s; then the term “change agency” was used on rare occasions in the 1960s; and that “change agentry” was coined yet later, probably in the late 1960s.