Which ancient civilization was the first to use city planning and sewer systems?

Who was the first present of the united states

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another? focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery? question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.

So far, the only person to serve as governor of two different states