How did city-states develop, and how did they interact with one another?

Throughout united states history, new groups of people have been given voting rights. this usually occurs through

Amanda reiss was injured at a wedding reception at a private home. amanda tripped over a piece of rebar that was sticking from the end of one portion of a sidewalk leading to the front door. amanda's lawyer believes that the homeowners were aware of the rebar problem and that other guests to the home had tripped over it but not been injured. how can amanda's lawyer get the information about the homeowner's knowledge? a. he cannot because they are not required to talk with amanda's lawyers b. he can depose the homeowners c. he can depose others who have been guests d. both b and c

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need more factual information than opinions.