In 1750-1900 countries were going through periods of rapid industrialization because of the industrial revolution. this industrialization brought on mass production of weaponry and goods which lead countries to participate in an arms race against one another to see who has the superior weapons, machinery, and resources. this constant competition echoed out culturally and socially too, hence the origin of nationalism.
The scientists who provided information about the events in the radio broadcast of The War of the Worlds established logos, by providing facts and details.