Ghana has a population of 24m. The USA has 310m.
Life expectancy in Ghana is 60 years. In the USA it is 78 years.
Literacy in Ghana is around 57%. In the USA it is 99%.
The entire GDP of Ghana is estimated at around $36 billion. The USA GDP is estimated at $14.2 trillion.
But Ghana can still beat the USA 2-1 in a world cup football match!!