Are there option choices or not? if not, it’s an opinion. i think one of the most significant inventions was the cotton gin or the telegraph. without the cotton gin clothes would still have to be sewn by hand. and without the telegraph, cell phones would not be as advanced.
Credit is essentialy a loan given that is paid back with interest. Arguably, credit caused the Great Depression. Many Americans invested in the stock market with credit when they did not have the money, so when a recession in the stock market occurred, many stockholders were in huge debt. Banks that lended money were out of money, and depositors lost money. This caused homes to foreclose, and because of the decrease in consumer purchasing power (people were in debt), companies laid off workers and unemployment rose.
Many Americans thought that the Japanese would fight until the point of complete annihilation.