What term did Henry Grady create to describe the time period?

Henry Woodfin Grady, (born May 24, 1850, Athens, Ga., U.S.—died Dec. 23, 1889, Atlanta, Ga.), American journalist and orator who helped bring about industrial development in the South, especially through Northern investments, after the Reconstruction period (1865–77).

Explanation:

in about winter like late november to january

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.