Are highly intelligent people less happy than individuals with average intelligence?

Generally, those who are smarter are able to better consider the consequences of their actions, as well as the consequences of other people's decisions. Further more, with greater intellect comes a greater ability to grasp larger concepts, often leading to existential questions that really can't be answered easily, if at all. With that kinda situation, its easy to say that in general smarter people are more depressed than "dumber" people. They have much more to consider and possibly get depressed about. And this is just a basic description. I could go on for quite a whole om this.