A drunk driver causes a car accident which leads to a death. In most cases, the applicable crime is involuntary manslaughter but law isn’t my subject today. Pam Stubbart of The Excluded Middle wonders about the seeming lack of mens rea in this kind of case. (via Philosophers’ Carnival #49). Since alcohol impairs one’s ability to reason, a drunk driver may lack the very ability to intend to kill. One obvious response is that the drunk drivers chooses to drink and is thus responsible for his subsequent actions. To this, Stubbart responds that

[t]he only fully-reasoned choice that drunk drivers make is to drink. The subsequent choice whether to drive or not is made in the drinker’s more or less inebriated state - a state which might preclude mens rea. The reasoned choice (to drink) is only sometimes correlated with the un-reasoned one (to drive drunk), and so we may not take the choice to drink as identical with the choice to drink and drive. As such, drunk drivers might lack mens rea for driving, the choice regarding the criminal act.

There is at least one faulty assumption in Pam’s framing of the issue: the inebriated cannot make reasoned decisions. Certainly, the inebriated’s judgment is clouded and his ability to assess risk is compromised. But that’s a far cry from the inability to reason. He was not merely an automaton compelled by alchohol to get behind the wheel and turn the key. Presumably, he knew where the car was parked, how to open the door, and how to start the ignition. He knew that stepping on the gas pedal caused the car to accelarate and remembered how to switch gears from “park” to “drive”. All of this is evidence of reason.

Indeed, if mens rea required the ability to engage in cost-benefit analysis and risk assessment, most criminals wouldn’t qualify. So I don’t think we need to transfer the drunk driver’s mens rea from the sober decision to have the first drink to the inebriated decision to drive. A monkey can’t drive a car, no matter how reckless he is. That’s because he lacks the complex reasoning skills required to negotiate the steering wheel and gas pedal. The drunk driver has those reasoning skills and uses them. The fact that he chose to limit those skills doesn’t preclude mens rea.