This is based on the poem "Chicago" by Carl Sandburg. In it, he talks about some of the things that are wrong with Chicago as well as how tough it can be to live in the city.
He however also praises the city and talks about how it still stands strong through all these challenges and likens this tenacity to the bravado and laughter of an ignorant fighter who has never tasted defeat and so goes into battle with little fear.
