Plessy vs. Ferguson and Brown vs. Board of Education were 2 very important Supreme Court cases. What did the Plessy vs Ferguson decision make legal? How did the decision in Brown vs Board of Education change that?

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.

Only 1 vote per state regardless of size why is this a problem

Which leader told the israelite people that god would lead them to a “promised land” if they obeyed god faithfully?