Generally, when mental health is mentioned, genes are thought of secondarily. It seems that the main problem lies in the state of our mind, brain. But, as the author notes, this approach is wrong.
Studies show that many mental disorders are largely determined by genetic predisposition to them. In addition, our thoughts are the result of brain activity, that is, the sending and receiving of numerous signals by billions of brain cells. The functioning of these cells depends on the molecules of which they are made, and these molecules are determined by genes.