what do i still need to know?

Hi,
  In my last post i stated all of the things that i know about the 1920's and the 1930's. here are the things that i still need to know.
          - How was the way of life different between the 1920's and the 1930's?
          - Was everyone effected during the sock market crash of 1929?
          - How did the great depression lead into World War two?
          - Why were the 1920's called the "roaring twenties"?
          - Why did the stock Market crash?
          - How did the Great Depression affect the rest of the world outside of the united states?
   These are the questions that i need to answer so that way i can have the most accurate essay. if there are any other questions that need to be asked please tell me.
   Cathy