<Li> High - yielding variety </Li> <P> Industries that were created or expanded during the post war period included television, commercial aviation and particularly in the US, computer technology . </P> <P> Keynesian economists argue that the post war expansion was caused by adoption of Keynesian economic policies . Naomi Klein has argued the high growth enjoyed by Europe and America was the result of Keynesian economic policies and in the case of rapidly rising prosperity that this post war period saw in parts of South America, by the influence of developmentalist economics led by Raúl Prebisch . </P> <P> One of Eisenhower's enduring achievements was championing and signing the bill that authorized the Interstate Highway System in 1956 . He justified the project through the Federal Aid Highway Act of 1956 as essential to American security during the Cold War . It was believed that large cities would be targets in a possible war, hence the highways were designed to facilitate their evacuation and ease military maneuvers . </P>

Much of the post world war 1 economic boom was due to the federal government's policy of