How could the Germans invade Belgium and France to truly start World War II when the French built the Maginot line and prepared for an attack in vulnerable areas ? Blitzkrieg radically changed all war strategy and tactics from the previous wars. In investing, as in war…either you adapt and change…or you lose. Markets in the next decade are likely to look a lot different than the last 14 years. Leon Levy’s writings from the 1960’s are as true today as then.