What was the role of the Cold War during the 1980s?

What role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

How did the protestant reformation and scientific revolution advance individualism and liberal reforms?