Everyone that is below the established level of what can be called “Elite” is what the Proles are, in '1984'. The proletariat, by definition, is someone who works to survive. Therefore, anyone who has to work, to earn a living and survive, is Prole.
Answer: The Compromise of 1850 was necessary because the North and the South were badly split on the issue of the lands that had been taken from Mexico in the recent war. California wanted to enter the Union as a free state, but that would have upset the balance between free and slave states.
Southern planters opposed high tariffs on imported goods the reason why they fought these tariffs was because they didn't really want to have such high tariffs and would rather have just traded among each other which they wanted to do, but wasn't able in all cases.