Where did the phrase "as mad as a hatter" come from?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

What did roosevelt believe was a common cause of both bank runs and the great depression?

Constantine created the first christian empire t or f asap