Louis Sullivan was an architect working in Chicago at the dawn of the skyscraper. He sought to define a new, bold style of design in the U.S., and was deeply frustrated when his peers didn’t do the same.
Research:

Robert Moses and the Shaping of New York, Part 2
42:12

Robert Moses and the Shaping of New York, Part 1
41:59

SYMHC Classics: Eradication of Smallpox
43:25