Individuals and Society evaluate economic choices differently because the individual is usually only interested in what benefits them (self-interest) while society is interested in what benefits the most people.
They had their own governer didn't they?
When dopamine levels are elevated this reward pathway reinforces the use of the drug.
Dopamine is an organic chemical that is produced in our bodies, and is related to reward-motivated behavior.
The anticipation of most types of rewards increases the levels of dopamine in the brain, and many drugs also increase dopamine as well as blocking its reuptake into the neurons follow release.
It can have drastic effects on the genders such as political involvement