We were on the gold standard in the mid-1870's, when we had a financial crisis.
You haven't heard of the greenback then.
We were on the gold standard when the Great Depression hit.
Sort of, but not really, especially after 1913. Paper currency already existed, and the debt-based monetary system had already been set in motion. You must borrow more to repay. Great Britain dragged the US into the depression. They inflated the GBP during World War I and a few years later tried to deflate it to its pre-war values. That caused a schism that the US was kind enough to try to support and caused a huge imbalance in gold flows across the pond.
Never read the story of the Midas touch, have you.?
Never read history much, have you?
Promising costs nothing, it's the delivering that kills you.