Wealthy industrialists who lived opulent and ostentatious lives during the late nineteenth century contributed to the period's nickname, the

Gilded Age

Explanation:

Gilded Age is a period in American history that is characterized by the lavish styles of living of the wealthy Americans, and the increase in philanthropism.

The nickname"Gilded Age" was coined by Mark Twain in 1873, and it is widely considered as the period in American history, in which a fast pace transformation took place, in every aspect of the American society including the economy, technology, and social perspective of the American customs and traditions.