A person should know basic life skills before turning thirty. Additional accomplishments are a bonus.
The terms may be religion, but a deeper look reveals real life traits that mature adults should acquire and live by.
At age 18, you're old enough to make your own decisions. You're also old enough to take responsibility for the consequences.
Without definitive criteria, it is hard to tell whether humans or animals make the better leaders. However, dinosaurs ruled the earth many times longer than humans have at this point of the earth's history.
There are resources for kids dealing with drunken abusive parents, even if those parents hold prestigious positions in their countries.
"Enjoying one's 20's" need not mean living off one's parents, but can include working full time.
To count as knowledge, something must be factually true.
Not nice enough, or too nice--the diagnosis matters little when there's no pleasing loved ones.
Having no part in divorced Mom's new relationship may not be an option.
A man who is successful by his own standards may, or may not, actually be successful depending on what those standards are.