What is the main conflict in Escape from Freedom by Erich Fromm?

"Escape from Freedom" is Erich Fromm's psychological history of the social conditions that developed in Europe between the Middle Ages and the mid-20th century which culminated in the rise of the Nazi Party to power in Germany under Adolf Hitler. Fromm is writing in 1941, after Hitler has come to power and begun his aggressive campaign to conquer Europe, but before the United States has entered what is to become the Second World War.