Why are some people more intelligent than others?
Yes, of course, some people are naturally intelligent than others. Scientifically it is some thing you inherited from your ancestors via DNA. It depends on luck as well. You see some people inherit the brains from their parents. Some people don’t. Even though their parents are intelligent they inherit the brain of someone not so intelligent (from a great great grand parent perhaps). This luck; some people say it is a gift from god. But as a buddhist, I believe that it is good karma. They are the result of good deeds we did in our past lives. So help people learn, teach children who are not as bright as you. Then you will get a better brain next life.