In the United States, no other criminal justice policies show more racially disparate impacts than that of drug law enforcement. Since the “war on drugs” began, efforts to end punitive drug policies that cause the widespread violation of constitutional and human rights has been needed to address the root cause of unprecedented levels of incarceration. Nationally, the ACLU works on marijuana law reform, the disparate impact of crack versus cocaine sentencing disparities, drug testing laws, and search and seizure policies.