Utilitarian philosophy - looking at parts in human nature, such as cost benefit analysis. People have to weigh the cost and benefits. People are rational calculators, calculate the cost and benefits before committing crime. People also fear punishment, if they choose to become bad or delinquent, they also realize that somehow there will be a fear of getting caught, and weight those components. Draws on classical ideas, such as deterrence and what kind of punishments to use. Draws the fear of punishment so that they can get mentality of i don"t want to get involved in crime . Effectiveness of deterrence-based policies, we try to use deterrence as a factor for teenagers who offend. Teenage brain is different and may think that they can never die. Tests of absolute deterrence- a system of jails and courts like the wild west and marginal deterrence.