Social Security
In the Gilded Age, also known as the time right after the civil war and right before the 20th century, the automobile was the most important and had the biggest impact on American economy.
Social security.This is because it is one of his only reforms that is still in effect today.The New Deal's Social Security Act has had the biggest long term effect on the American economy.
Automotive
global warming or economy
very big
Who founded Microsoft, which became one of the biggest corporations ever.
the nations wide
manufacturing
Regulation Increased.
permanently ended the Great Depression
Impact marine insurance on an economy?
I would say that the automobile was the transportation development that had the greatest long-term impact on the American economy. Just think of all the things that its invention affected--tourism, hotels, construction businesses, etc. Plus, the autombile is still affecting the American economy today.