If a mad scientist were to repair to his laboratory to design a machine that would make white liberals uncomfortable, that machine would be Thomas Sowell
From Thomas Sowell: Peerless Nerd in the December issue of Commentary magazine. By all means, read the whole thing.
Another excerpt from the article, and an example of what the QotW is talking about:
(A)s Sowell reminds us, reality is not optional; facts must be accounted for. It is not as though he is in possession of secret, arcane knowledge. For instance, these facts are easily documented: Gun-control laws began to be passed during times when crime was declining, rather than climbing. Crime began climbing after gun-control laws were passed. Places with very strict gun-control laws typically have more crime than do places without them—a fact that holds true between countries and between regions of the United States. There is little or no relationship between the rigorousness of gun-control laws and criminals’ access to guns. Many countries have lots of guns but relatively few murders, while others have few guns but relatively many murders. Swimming pools kill many more people in accidents than guns do. You do not have to be a great scholar to look at those facts and ask: What is the point of gun-control laws?
ETA: Dr. Sowell put in another appearance on Uncommon Knowledge back in October. He discusses his latest book, The Thomas Sowell Reader, the subject of the Commentary piece. You can watch it here.