Devil in the White City Chicago World's Fair benefits and downfalls...

I need to write an essay on The Devil in the White City. I read the book and
i have a pretty firm grasp on it, but im still having trouble finding events and ideas that occur that happen in the Gilded Age and ESPECIALLY in Chicago during the World's Fair that would become a downfall had Chicago won the bid to host the 2016 Summer Olympics.

Aside from the GREAT chance another Holmes might be on the loose, I don't really have that much material.