Answer :
The correct answer to this open question is the following.
The paragraph summary of the history of credit and consumerism would be one like this,
There was a time in the United States history, somewhere at the beginning of the 1920s, where America lived a time of economic prosperity. Citizens had the money to buy necessary but mostly unnecessary things. How? And here comes the key, due to the use of credit. Yes, banks gave a lot of credit so people could buy cars, homes, electro domestics such as TV's and refrigerators, and more.
This time has a name. It was known as "the Roaring 1920s in America."
Let me add something else.
Things started to go in the wrong direction and at the end of the decade, on October 29, 1929, the US stock market crashed, millions of people lost their jobs, starting a terrible period called the Great Depression.