Jason Riley, writing at the Wall Street Journal on August 8, 2017 (“Legalizing Pot Is a Bad Way to Promote Racial Equality” https://www.wsj.com/articles/l... ) "blacks commit violent crimes at seven to 10 times the rate whites do." That assertion is simply false. There is no good evidence that any racial or ethnic group is more inclined to violence or criminal activity than another, it's an assumption that's racist and wrong.
On December 31, 2015, state and federal prisons combined held a total of 1,476,847 people, of whom 499,400 were non-Latinx whites, 523,000 were non-Latinx blacks, 319,400 Latinx, and 135,100 whose race/ethnicity was counted as "other".
An illegal drug conviction was the most serious offense for 206,300 out of the 1,316,409 people in the US sentenced to state prison facilities at the end of 2014. That represents 15.7% of all sentenced prisoners under state jurisdiction. Of this total: 67,800 (32.9%) were non-Latinx white, 68,000 (33.0%) were non-Latinx African American, and 28,800 (7.2%) were Latinx. No race/ethnicity was reported for the remaining 41,700 people (20.2%) serving time in state prison for a drug offense.
Number of Adults Under Correctional Supervision in the US: "At yearend 2015, an estimated 6,741,400 persons were under the supervision of U.S. adult correctional systems, about 115,600 fewer persons than yearend 2014 (figure 1). This was the first time since 2002 (6,730,900) that the correctional population fell below 6.8 million. The population declined by 1.7% during 2015, which was the largest decline since 2010 (down 2.1%). Additionally, the decrease was a change from a 3-year trend of stable annual rate declines of about 0.6% between 2012 and 2014. About 1 in 37 adults in the United States was under some form of correctional supervision at the end of 2015. This was the lowest rate observed since 1994, when about 1 in 38 adults (1.6 million fewer persons) were under correctional supervision in the nation (not shown)."
"At year-end 2016, there were 450 prisoners sentenced to more than 1 year in state and federal prisons per 100,000 U.S. residents of all ages (table 6). The imprisonment rate for the U.S. population of all ages was the lowest since 1997 (444 per 100,000 U.S. residents) (see figure 1). Among U.S. residents age 18 or older, there were 582 prisoners sentenced to more than 1 year in state and federal prisons per 100,000 U.S. adult residents at year-end 2016.