Copypasta

If all blacks suddenly left America...
(keep in mind blacks only make 13% of the US population)

>The prison population would go down by 37%
>There would be almost 50% less gang members
>Rape would go down significantly
>Overweight and obesity percentage would go down by 10%
>Average IQ would go up 7 points, putting the USA tied for third with Japan
>SAT scores would go up by about 100 points
>ACT scores would go up by 5.5 points
>AIDS and HIV would go down by over 67%
>Chlamydia cases would go down by 50%
>Gonorrhea would go down by 69%
>Syphilis would go would go down by 58%
>The average income would be over 20k more per year
>The amount of people in poverty would go down by over 30%
>Homelessness would go down by 57%
>And the number of welfare recipients would go down by about 40%

Sources:
en.wikipedia.org/wiki/Demographics_of_the_United_States

www.bop.gov/news/quick.jsp#1

kff.org/other/state-indicator/adult-overweightobesity-rate-by-re/

www.nytimes.com/books/first/j/jencks-gap.html

www.amfirstbooks.com/IntroPages/NonToolbarTopics/IdeologicalQuiz/Quiz-3-Commentary/IdeolQuiz_Answer_02.html

aids.gov/hiv-aids-basics/hiv-aids-101/statistics/

www.cdc.gov/std/stats11/gonorrhea.htm

www.cdc.gov/std/stats11/syphilis.htm

www.cdc.gov/std/stats11/chlamydia.htm

www.census.gov/compendia/statab/2012/tables/12s0697.pdf

kff.org/other/state-indicator/poverty-rate-by-raceethnicity/

homeless.samhsa.gov/ResourceFiles/hrc_factsheet.pdf

www.statisticbrain.com/welfare-statistics/

www.nationalgangcenter.gov/survey-analysis/demographics

nces.ed.gov/fastfacts/display.asp?id=171

nces.ed.gov/programs/digest/d10/tables/dt10_155.asp

Anthony Walsh (January 2004). Race and crime: a biosocial analysis. Nova Publishers. pp. 23–24. ISBN 978-1-59033-970-1. Retrieved 1 October 2011.