Final answer:
The great era of organization building in America took place during the late nineteenth and early twentieth centuries, marked by the establishment of key regulatory commissions and the substantial growth of bureaucracy in response to industrial and urban developments.
Step-by-step explanation:
The great era of organization building in America, characterized by significant bureaucratic growth and institutional development, primarily occurred during the late nineteenth and early twentieth centuries. Notable establishments, such as the Interstate Commerce Commission in 1887, the Federal Reserve Board in 1913, the Federal Trade Commission in 1914, and the Federal Power Commission in 1920, marked this era of expansion and regulation. The growth of bureaucracy was a response to the changes brought about by industrialization, urban growth, and a desire to regulate and oversee the expanding economy and public services. Another period of large-scale bureaucratic expansion occurred in the 1930s and the 1960s, following the passage of significant legislation that shaped labor relations and the broader economic framework of the country. The National Labor Relations Act of 1935 and subsequent federal encouragement for union formation were part of this expansion, which aimed to manage the nation's economic and social evolution.