During the 1950s, increased incomes and easy credit led many Americans to embrace which phenomenon?

It led many Americans to accept the phenomenon of Consumerism.

Explanation:

After the second world war, the United States experienced a torrential economic boom in the 1950s. This led to increase in employment, trade expansion, increased incomes, improved conditions of living. Thus, most Americans embraced Consumerism in the United States. The concept of consumerism in the United States during the 1950s allowed and encouraged the citizens to purchase goods of high quality at more costly prices. Citizens became more extravagant in their spending.

the answer is bastille

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.