I want to know the answer to the following question:
According to German historian Reinhart Koselleck, which two social structures left a decisive imprint on the Age of Enlightenment?
All the background I'm provided with is that "German historian Reinhart Koselleck claimed that "On the Continent there were two social structures that left a decisive imprint on the Age of Enlightenment: the Republic of Letters and the Masonic lodges.". Is that enough to answer the question?