When in the Course of human events, it becomes necessary for one people to dissolve the political bands
which have connected them with another, ... a decent
respect to the opinions of mankind requires that they
should declare the causes which impel them to the
separation

to inform the reader that the text will take a second look at the grimms’ original tales

in what passage i'm sorry but i don't see anything there.

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.