Based on the discussions in the preceding chapters, this chapter explains the characteristics and significance of business management changes until the end of World War II. It also explores continuity in business management before and after World War II, the pursuit of economic rationality in Germany, and the origins of the nature of German enterprise as a “Social community.” First, the characteristics and significance of business management changes in the periods of the Second Reich, the Weimar Republic, and National Socialism are considered. Next, this chapter examines which “continuity” can be observed in business management before and after World War II, how the progress of business management development until the war’s end was, and how it influenced and contributed to business management in the postwar period. Finally, this chapter clarifies the origins of enterprise as “a social community” by examining the pursuit of economic rationality in Germany from a comparative perspective with the United States.