Which ideology created fear among business leaders in the united states during the late 19th century and early 20th century?

nativism
socialism
progressivism
capitalism

Socialism

Socialism was very popular during the late 19th century and the early 20th century, mainly due to the writings of Karl Marx.

Socialism is a system in which everyone in society own the factors of production equally. The factors of production are the resources required to produce goods (labor, goods, capital resources). This is done through a well-organized, strong, central government.