- In the fifth century BC, the Persian empire had 44% of the world’s population
- In 1870, the British Empire accounted for 35.9% of the world’s GDP, followed closely by America’s 35% in 1945
- Nazi Germany’s economy was roughly half the size of Britain’s in 1938
- India in the second century BC had a larger population than China in the 1100s
Also, from a different source I found out that in 1913, Europe was more populated than China and it combined with its former colonies in North America made up 33% of the world’s population.