This is developmental biology: to recognize both inherent and natural limits but also to recognize the ability of humans to adaptively improve their surroundings for the better.

To say that everyone has the same level of skill and talent is harmful for people can clearly see their own ability yet cannot meet the expectations of society. If we believe everyone is the same, then it puts the culpability onto the individual to do well rather than society and government.

Aristotle reflected that king does not beget king, nor does slave beget slave. He thought some to be worthy and capable despite their lowly position in society. It comes from the book Politics.