Historian Victor Davis Hanson, pointing to the experience of the United States after World War I, warned of the dangers inherent in embracing isolationism during a speech at the Heritage Foundation Tuesday.

“This is the first administration that has not studied World War I or World War II or appreciates the post-war order that brought the greatest level of prosperity, personal freedom, security in the history of civilization,” said Hanson. “It requires an engaged United States.”Hanson detailed how World War I was the first war in American history that ended without unconditional surrender and how the murky terms under which the United States left Europe and Asia opened the door for renewed aggression that manifested itself in World War II.