In the 20th century, one of the big boost in general health was a better understanding of hygiene and its importance.
I do form the hope that in the 21st century we will make a similar progress towards mental hygiene and make sure to not create too toxic environments, give kids the kind of nurturing they need, and treat infections before they become deadly.
Some groups have managed to "teach empathy" to juvenile delinquents who are diagnosed with psychopathy. Finding a treatment is the first step. Then we need to grow as a society and realize that giving healthcare including mental one to everyone is not giving away "free lunch" but actually improving the overall society.