According to the Merriam-Webster Dictionary
prosperity
pros·per·i·ty | \ prä-ˈsper-ə-tē \
Definition of prosperity
: the condition of being successful or thriving especially : economic well-being
As I thought of this topic, the person who kept coming to mind was my grandfather Antonio DellaVecchia.
Antonio DellaVecchia was born 24 January 1903 in Vasto, Chieti, Italy. He left home at the age of 17 to travel to America. He arrived in New York City in 1920 on a ship that sailed from LeHarve, France with his cousin Paulo Florio.
My grandfather did not spend much time in NYC as he settled in Clifton Heights Pennsylvania, where he became a naturalized citizen in 1926. He then went back and married my grandmother in 1929 in Lentella, Italy.
He came back to the United States and was a very successful contractor and investor in real estate.
This is a list of the properties that my grandmother had after my grandfather died in 1976.

My own Dad and brother have continued with the construction company.
My grandfather lived the American Dream.