21st. century of China. 20th. century of USA. 19ht. century of the UK. British Empire.

IQ map of the world.
IQ of native people. Indigenous population. Public domain image.
21st. century. will 21. century be century of china.
1945: usa atomic bombing of hiroshima japan.
1969: USA man on moon. 20th. century power.
UK empire.
Quarter of earth's land-mass. From portugal to spain, france and United Kingdom empire. 19th century. century of the British.