One problem was that some states didn't fully understand the meaning for it
I got three for ya
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1.) The gold rush caused California's population to increase dramatically;
2.) it brought people from many different backgrounds to California; it made California more democratic because people were more equal in mining communities;
3.) it caused Native Americans and Californios to lose their land
One reason is that the taxes were unfair. The colonists thought that they should have some say in government. Sometimes they were taxed on stuff that was so little that it shouldn't have had taxes. These are just some that I can remember. Hope this helps!
The reason is very simple - profit.
The rabbits were not worth much to the Europeans, but were to the Aztecs, but the cocoa beans for the Europeans were like gold. They were a very attractive exotic product from which unique and unseen things were made. In the European market the cocoa beans had enormous price, and the demand for it was very high especially from the aristocracy which loved it and didn't speared money for it.