Why did many of the nations immigrants oppose the expansion of slavery?

How w.e.b. dubois wanted to improve the social and economic situation that existed for african americans during the early 19th century?

What are the winter holidays the annex residents celebrate? a. chanukah and st. nicholas b. st. nicholas and new year's c. christmas and kwaanza answer if your a 100% percent sure ^-^

Who were some of the most important scientist in there and shipments of the revolution