Why did europeans bring to the new world that caused the deaths of millions of native americans

What does the document of the birtish octopus is an uderlying cause of the world war 1

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.

Based on this poster, what conclusion can be made about the u. s. government during world war i? it wanted to boycott trade with enemy nations. it wanted to provide low-cost loans to its allies. it was not able to fully finance the war effort through taxes. it believed the majority of its citizens did not support the war.