All the old colonialist powers in Europe lost global power. After 1945, the USA consciously decided that it had a ‘competitive advantage’ over all other states. She was sufficiently strong economically that she did not need colonies to take a globally dominant position. During her discussions with Britain in 1943, she laid down that one of her prime conditions for the peace was that all colonised countries were to be open to USA trade. By 1945, the USA was sufficiently powerful to enforce this decision against the wishes of the older colonising powers in Europe and Japan.

Perhaps the most important historical global change after the defeat of Germany and Japan in 1945 was the USA taking over world power.