What can we learn from the massive size and scope of the Holocaust?

Not everything is what it seams at first, the world is a dark place and this was going on under people's noses and they realise the extent of it ontill ofterwards

many people were so innocent that they did not even know what happened

and let it go around until it actually got out and the amount that people helped out to free people

Explanation:

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.