Main reason for feudalism in western europe during middle ages ?

How does wards description of the roman government compare to polybius description in sorce 1 and millars description in source 2

He table below shows the number of immigrants to the united states from different regions of europe between 1871 and 1910

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.