SPIEGEL ONLINE: Mr. Ritschl, Germany is coming across like a know-it-all in the debate over aid for Greece. Berlin is intransigent and is demanding obedience from Athens. Is this attitude justified?

Ritschl: No, there is no basis for it.

SPIEGEL ONLINE: Most Germans would likely disagree.

Ritschl: That may be, but during the 20th century, Germany was responsible for what were the biggest national bankruptcies in recent history. It is only thanks to the United States, which sacrificed vast amounts of money after both World War I and World War II, that Germany is financially stable today and holds the status of Europe’s headmaster. That fact, unfortunately, often seems to be forgotten.

SPIEGEL ONLINE: What happened back then exactly?

Ritschl: From 1924 to 1929, the Weimar Republic lived on credit and even borrowed the money it needed for its World War I reparations payments from America. This credit pyramid collapsed during the economic crisis of 1931. The money was gone, the damage to the United States enormous, the effect on the global economy devastating.

SPIEGEL ONLINE: The situation after World War II was similar.

Ritschl: But right afterwards, America immediately took steps to ensure there wouldn’t be a repeat of high reparations demands made on Germany. With only a few exceptions, all such demands were put on the backburner until Germany’s future reunification. For Germany, that was a life-saving gesture, and it was the actual financial basis of the Wirtschaftswunder, or economic miracle (that began in the 1950s). But it also meant that the victims of the German occupation in Europe also had to forgo reparations, including the Greeks.

“He warns the country should take a more chaste approach in the euro crisis or it could face renewed demands for World War II reparations.”