The main reason why democracy is called a government by discussion and persuasion is because the "majority opinion" of the voting base makes up policy at the state level, and in order to shift a majority opinion it often requires large amounts of debate and discussion of the issues at hand.
<u>Similarities between America and Europe:</u>
Both introduced new crops like corns, beans and potatoes. The interaction between Europe and America led to the spread diseases like malaria which spread from Europe to America leading to decline in population of America. Foreign animals were exchanged between America and Europe. America got horses and pigs while Europe got animals like alpacas and pack animals.
<u>The differences between Europe and America:</u>
In America, the spread of diseases led to a decline in population whereas In Europe because of valuable crops, the population increased. For America, the environment changed because of overgrazing by animals but for Europe, the environmental impact was minimal.
It depends on which course you're studying. Different nomads had different reasons. I'm sorry I wasn't able to give you a better answer.
