High Quality Content by WIKIPEDIA articles! Mark Albert Robert Kleiman (born May 18, 1951) is an American professor, author, and blogger who is a Professor of Public Policy at the UCLA School of Public Affairs. Kleiman is a nationally recognized expert in the field of crime and drug policy and the author of When Brute Force Fails: How to Have Less Crime and Less Punishment, Drugs and Drug Policy: What Everyone Needs to Know, Marijuana Legalization: What Everyone Needs to Know, Marijuana: Costs of Abuse, Costs of Control, and Against Excess: Drug Policy for Results. Kleiman also advises governments from the local to federal levels on crime control and drug policy.