Reader recommendation: Conquests and Cultures Latest News Save for later Saved Subscribe For US visa hopefuls, screening hurdles grow. Shades of 'extreme vetting'? Could a Moore's Law for carbon halt climate change? How a New Zealand earthquake is upending hazard models Virgin America to disappear: What that says about airline travel Monitor readers share their favorite book picks. By Muriel Horacek, La Cañada, Calif. October 13, 2014 Save for later Saved About video ads View Caption of Thomas Sowell’s Conquests and Cultures gives great insight to the problems of today in Nigeria, Ukraine, and the Middle East. Recommended: How much do you know about Ukraine? Take our quiz!