"New York Times" columnist Paul Krugman devoted a chapter of his book "The Conscience of a Liberal" (2007) to the movement, writing that movement conservatives gained control of the Republican Party starting in the 1970s and that Ronald Reagan was the first movement conservative elected President.Paul Krugman described the rise of movement conservatism in his 2007 book "The Conscience of a Liberal" as occurring in several phases between 1950 and Reagan's election as President in 1980.