Dr. Sowell exhibits remarkable clarity of mind.
The main barrier I see is that hard work and honesty are viewed with suspicion
Ways that persons at the bottom can be their own worst enemy: alcohol; unhealthy eating; psychiatric drugs rather than self-control; lotteries; divorce; smoking; “education is for white folk”; crime; illegitimate kids; more kids than they can afford; won’t save money (even small amounts); social promotion in schools; disrespectful to teachers and bosses; and on and on.
Any more additions?