Why did living conditions for southerners—black and white—change after 1820?

Cotton production expanded. The cotton gin was invented to pick out the seed from the cotton fibers. Led to increase demand of slaves, The south became dependent of plantations and slavery. It got better for them but worse for the slaves.

you will need these

an outline of all three paragraphsan identification of the historical era that you are writing aboutan explanation of the term mass productiona description of two ways new technology affected industrya conclusion that shows how new technologies allowed industrialization to grow

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.