Inexpensive amusements included backyard games, puzzles, card games, and board games such as Monopoly, which was introduced in 1935. Even the national pastime, baseball, changed profoundly during the Great Depression.
I think the answer is the Silk Road but I'm not sure.
Answer:
I think its paper
Explanation:
The Europeans made a paper factory before anything else, I'm not 100% sure, and sorry if you get it wrong.