Slavery and democracy are usually two sides of the same coin. The United States, as well as the Greek city-states that inspired the whole of the West with their ideals, were always based on slavery.
In Milwaukee, Wisconsin, USA, riots have dragged on into their second day in response to the murder of an armed African American while police tried to arrest him. Protesters have set fire to several shops and destroyed a bank while accusing authorities of repression and racism.