system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why/How did Germany's economy not fall as badly after WWII than it did WWI?

I always see or read in documentaries and books that after World War 1, Germany's economy had been reduced to almost nothing and that the Mark was basically worthless. I don't hear much about anything like that happening after World War 2. Did their economy crash and it's just that nobody talked about it as much? Or was there another reason it stayed afloat?
gpt
After WWI, the Allies demanded a lot of "reparations" (money) from Germany, deeper bankrupting a nation already drained of resources, creating the situation (misery, resentment) that led to the rise of Nazism.

After WWII, having learned an invaluable lesson and ready to avoid making the same mistake again, the US instated the Marshall Plan, $17 billion ($120 billion in today's money) in aid to prevent the local economies going into a free-fall, and rebuild Europe.  
There was also another crucial, political goal:  keep Western Europe happy to prevent the spread of communism.

A similar plan was implemented in Japan, under the watchful eye of General Douglas McArthur.