As a former law professor, I would start my criminal law courses with the basics: There are two kinds of laws: malum in se and malum prohibitum.  With the first, a law exists because the prohibited conduct is inherently bad; murder, theft and rape would be obvious examples.  With the second, the conduct is illegal [...]

Read the complete post at http://www.duiblog.com/2010/03/22/why-is-drunk-driving-illegal/