The Bessemer still process affected west award expansion in the United States by enabling

The Bessemer steel process affected westward expansion in the United States by enabling? clipper ships to be built in order to transport passengers from the East Coast to the West Coast. interstate canal systems to be built in order to transport agricultural goods from west to east.

Explanation:

I believe the answer is:  He values artistic success over financial success for himself.

Pay attention to this part of the sentences:
With the Crash, I realized that the greatest fantasy of all was business. The only realistic way of making a living was versifying. 

From those sentences, we can interpret that the Financial Crash make Harburg altered his perception on wealth. He saw that the way he used to make money was completely meaningless. So he choose to stop it and decided to pursue his other passion in life.