There is serious concern the the most recent economic recession will affect how much optimism that families feel about the power of hard work to achieve the American Dream

working-class

Explanation:

There is serious concern the the most recent economic recession will affect how much optimism that working-class families feel about the power of hard work to achieve the American Dream .

Due to the hardship imposed by the 2007 to 2009 economic recession, there is a fear that working-class individuals will begin to doubt the power of hard work in achieving the American Dream since they get little for their work.

"social stratification refers to the way people are ranked and ordered in society. in western societies, stratification is primarily seen and understood as a result of socioeconomic status, which produces a hierarchy in which access to resources, and possession of them, increases from the lower to the upper strata"

because the early people found out about it.