Gay Nineties is a term that refers to the decade of the 1890's in the United States. The decade was a period of exceptional economic expansion, and, in particular, of rapid wealth gains in New York City and Boston. The American empire of trade was at one of its zeniths, and cities were growing rapidly. While the same decade saw an explosion of immigration to the United States from less economically prosperous lands, and consequently no gaiety for the working classes, it was a period of vast wealth for a newly emergent "society set." The railroads, the agricultural depression of the US Southern states , and the dominance of the United States in South American markets and the Carribean meant that industrialists of New England were doing very well.
The term itself began to be used in the 1920's, but the high life of the "old money" families was well documented in the novels of, for example, Edith Wharton.
