Answer:
It became a better country, and we have not had a huge war like that again, yet.
No. Japan bombed the Pearl Harbor mainly due to being desperate. The US had placed an embargo (no trade rule) on Japan. This led to no trade between the US and Japan and led Japan to losing a lot of money.
Agricultural prices and earnings fell. Shipping-related industries were devastated. Causing a financial depression from 1807-1814.