Jimmy Carter, who turns 100 on Oct. 1, doesn’t get enough credit for the quarter-century economic boom from 1983 to 2008 and the underlying resilience of the economy since. Without Mr. Carter’s deregulation of airlines, trucking, railroads, energy and communications, America might not have had the ability to diversify its economy and lead the world in high-tech development when our postwar domination of manufacturing ended in the late 1970s. The Carter deregulation helped fuel the Reagan economic renaissance and continues to make possible the powerful innovations that remake our world.