I do not mean to contend the major part played by America in the history of the 20th century, but a bit more interest for other parts of the world would be welcome.
No offence intended, obviously, I do like your quizzes, despite their occasional (and mostly adequate, given that this iis an American website) American bias.
Even today, the U.S. is 24% of World GDP.
In 1960, it was 40%. I can't find a source for 1950 right away, but 50% is a good bet. as you say, Europe and China were devastated in the wake of WWII.
Some 'facts' are just too obviously wrong. If the largest polity the world has ever known only commanded 36% of global GDP at its height, how on earth can you even begin to think that 50% for the USA is right?
So, while I am comfortable with other cultures, I tend to gravitate
toward these, which are made by Americans. A suggestion? Those of you who are offended by the heavy emphasis on Americanism in these quizzes should absolutely boycott them and CREATE YOUR OWN!