That's a good logical based point. Especially when we think of just a few hundreds of years ago. We all lived in our little tribes. No global or even intercontinental travel, closer family and community ties because we had to work together to live. Take away that stability and add the countless stressors of modern life and we see our mental states strained farther than some people can handle. Especially when your a famous or at least well known public person. So your always under other's scrutiny and become self conscious etc...