Take a society.
Immerse its children in action films and games which have minimal character development and plot. Let them conduct much of their communication via text messaging and tweets and rarely, if ever, by writing a letter. Foster impatience and instant gratification. Cater to short attention spans. Peddle the notion that learning should always be fun. Tell them they are great and that whatever they want is well deserved. Stay away from the old practice of requiring children to memorize poetry or famous speeches. Let them believe that knowing facts is unnecessary since everything can be looked up. Don't teach logic. Don't train them on how to spot bias in an argument. Reward desire and good intentions and not hard work and results.
Do all of the above for several generations and then see what you'll get.
It won't be pretty.