The answer should be Benito Mussolini.
<span>The main effect that the use of credit had on the economy in the 1920s is that it allowed people to make poor and risky investment decisions that led to a great amount of over-valuation of stocks. This led to the Great Crash in 1929.</span>
His inventions sped production. This made life easier. This also made things faster for everyone.
Yes, they did. Even though it was not as effective as modern procedures