The United States has stumbled into a potential military confrontation with Russia over Ukraine - a dangerous predicament that could become a Cuban Missile Crisis in reverse.
The "Black Death" moved across Eurasia, driven by climate events that were and still are frequently occurring.
Ravi Batra is a professor of economics at Southern Methodist University, Dallas. This article is based on his two books, "The New Golden Age" and "Greenspan's Fraud." His web site is ravibatra.com.