Three characteristics of hunter-gatherer societies were: people moved around a lot trash was spread out over a large area diseases spread quickly little surplus food was available many major social changes took place

What was the biggest role in connecting rome with rich regions

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.

What type of monarch was fredrick the great ?