Admiral Leahy believed the Japanese were weakening and ready to surrender. The atomic bomb would be overkill and he believed it wouldn't work. He was also concerned that if it worked then the US has revealed new technology that would eventually be used against us.
Increasing trade between European countries and their colonies contributed to the development of "capitalism," since it became far easier for firms and people to profit from sales.
It creates an additional need for natural resources to be used in the manufacturing and it creates the need to find new markets to sell European products
