It's not. The Age of Imperialism ran from about 1870 to 1960 or so, when various European countries decided that they had the right to divide among themselves other areas such as China and Africa.
Europe colonized Africa during the Age of Imperialism in the 19th century.
Sociology became established as an academic discipline in the 19th century, particularly with the work of Auguste Comte, Karl Marx, and Emile Durkheim. The term "sociology" was coined by Comte in 1838, and the first department of sociology was established at the University of Chicago in 1892 by Albion Small.
Mark Twain called the late 19th century the "Gilded Age." By this, he meant that the period was glittering on the surface but corrupt underneath. In the popular view, the late 19th century was a period of greed and guile: of rapacious Robber Barons, unscrupulous speculators, and corporate buccaneers, of shady business.
34
In the 19th century
Some confine the Little Ice Age to approximately the 16th century to the mid 19th century.
The 'Age of Reason' is a term for 17th century philosophy. Impressionist painting was 19th century.
Yes most European nations have gone through a period of imperialism. In the modern world this is impossible to repeat but today's superpowers (Russia, China, and America) are going through a similar phase using market influence and trade strengths.
From the late 19th century to 1940s.
Makrk Twain named the "Gilded Age" to describe a time after the Civil War.
The age of iron is the 19th century when it became possible to make iron and then steel in large quantities.
It was replaced by the percussion system