The first conquest of a major civilization in the americas was by

Which term best describes the progressive era

Explain why american modernist writers might have perceived the world as chaotic in the early part of the 20th century. should be at least 250 words.

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.