They became more populated. Some would say more pollution was in the air.
The Economy changed in many ways.
-Seth
Democracy dates back to have started to develop in the days of Ancient Greece in the city state of Athens.
Not sure if this is what you were looking for but I hope it helps.
To protect them from being recognized.
Answer:
William C. Nell was an African American civic activist, abolitionist, and historian. He was also a founding member of the New England Freedom Association in 1842, a black Boston organization that assisted fugitive slaves in their efforts to gain freedom.
They thought the best way to avoid being dominated is to destroy them before they can destroy them.