Again, this means that the constitution should have that level of flexibility to meet the needs of the people. Since the evolution of America experiences rapid and drastic changes – for example, from the 1920s to the 1960s there were many social/economic/political changes in America – this makes, if necessary, that type of adaptation also exists in the constitution. For Yoo, the authors intended this level of adaptation to exist for generations to come, and should be expected in the present day. This strengthens Yoo's argument about presidential war power in America due to the fact that we live in more terrifying times than the time of the architects of early America. It makes sense to vest that immediate authority in a single person who can work quickly and efficiently to protect the American people as commander in chief. And once again, this was born in the minds of the authors because of their experiences with