Indeed. Give me 1910. Totally serious. The 20th century was mostly a mistake.
I would sum up the 20th century as mankind getting many many powers that he wasn’t prepared to handle. Hubris.
I’d say it a different way. The 20th century was our greatest, but the seeds of our destruction in the current century were planted along the way, starting at the exact moment you stated. Just looking at the disastrous amendments passed during the following decade. Then, the packing of the court by Roosevelt to allow all his big government plans, followed by billions in dollars of social spending that created the 21st century plantation of dependency that has tilted the American people from achievement to being takers. The American culture was destroyed.