What factors may have contributed to the industrialization and ending of slavery in the north while the south remained agricultural and still had slavery?

The information box says that the han added 4,000 miles of wall. refer to the mileage scale. how can this be true?

Historians sometimes rely on video recordings in researching past events because

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.