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Well after World War I the Great Depression happened. So much of the Roaring '20s was a continual cycle of debt for the American farmer, stemming from falling farm prices and the need to purchase expensive machinery.
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Greek democracy created at Athens was direct, rather than representative: any adult male citizen over the age of 20 could take part, and it was a duty to do so. The officials of the democracy were in part elected by the Assembly and in large part chosen by lottery in a process called sortition.
The Inca empire was known for advances that bettered their community and kept balance from within. Some of the things that empires like the Inca used we still may use today.
The Inca had very advanced road systems that they used very frequently. These roads were used primarily for communication and trading goods. Communication, as you can imagine, was very hard back in those days. There was no phone or barely a good mail system, so if someone you knew lived far away, it would be very hard to keep in touch. There were certain message carriers, that would carry messages down these roads to different people.
The Inca also had a very complex government and taxing system. It is very hard to believe that civilizations so far back in time could keep track of things such as government and taxing, even though they didn't keep any written records or anything like we do today. The Inca is known for its complex, advanced, and well done government. This government was called the "<em>Tawantinsuyu</em>" and had numerous people keeping watch over the civilians and how much they paid in taxes, but had one ruler among everyone.
Empires, such as the Inca empire, had to do with many of our advances today and it is astonishing how much they accomplished back in that time.
The first year that had an Earth day was 1970. Earth day is to get people to cut down on pollution and recycle. It is to overall treat the earth better.