My First Question:
As far as I know, after the phrases like "many of", "some of" and "all of", we can't use a noun without the article. For instance, we cannot say:
"All of people are unintelligent"
We have to say:
"All of the people are unintelligent"
to use the phrase "all of" even if we are talking about all people who are alive. Am I right?
Can I say "All of the people", "Many of the men", "Some of the women", etc, if I am talking about all people in the world, many men among all men in the world and some women among all women in the world etc.?
I know that I can say "All men", "Some people", etc without using the word "of" by the way, but I wonder if I can say those phrases like "all of the" instead.
I also know that I can use those phrases which include the phrase "of the" when I talk about a specific group of things like in:
All of the players of the American team are very athletic.
Here I am referring to the players in the American national basketball team while watching a game.
But, as I said I want to know if can use those phrases which include "of the" for referring to things generally. I mean, when I talk about all basketball players in the world instead of all basketball players in the American team, can I say:
All of the basketball players are very athletic.
My second question:
What about the sentences where we use percentages? If I am talking about all people in the world generally, can I say:
50% of people are unintelligent.
Or do I have to say:
50% of the people are unintelligent