The aim of the present study is to examine the Swedish government's strategies for steering in the area of security of supply during the 20th century. More specifically, the study focuses on the establishment of a number of central agencies with a designated responsibility to, among other things, coordinate other actors. This report covers the period after the Second World War, while the period before that was covered in a previous publication. A main conclusion in the report is that the government's steering in the middle of the century was mainly based on a hierarchical approach, which in contemporary social science research is often called "government", in contrast to "governance", denoting a flatter steering approach. The government approach was mainly expressed through the granting of the central agency with a mandate to issue directives to other authorities. Moreover, these authorities and other organizations lost their membership in the central agency's board. Over time, however, steering increasingly reverted to the governance that characterized the time before the Second World War. The right to issue directives was eventually removed and different types of councils were instead linked to the central agency. Another conclusion is that the expansion of the perceived threats within defence planning that took place during the 1970s, through the introduction of the so-called peace crisis, indicated both change and continuity. The peace crises were new insofar as they had nothing to do with war or the threat of war, but at the same time this new type of crisis was nevertheless connected to earlier formulations of economic threats used in defence planning.