Homogeneous comes from the Creek words homo, which means “same” or “equal”, and genus, which means “race”.
In regard to population, the word homogeneous means of the same race or of common descent. Of all the countries on earth, the nation with the most homogeneous population is Korea.
Both North Korea and South Korea have a population that is 100 percent homogeneous, which means that there are almost no people in Korea that are not Korean.
No other nation has a population that is 100 percent homogeneous, although a few, such as Japan and Portugal, are 99 percent homogeneous.