What evidence could be cited to refute the claim that the middle ages were completely ""dark""?.

How did the constitutional convention deal with slavery , one the most divisive issues of the period

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.

Describe the impact of the neolithic revolution on civilization