On November 7 the world will mark a grim anniversary: One hundred years since the small but devout faction of Marxists called the Bolsheviks lost a popular election. It was the last one Russia would see for 70 years. Instead of accepting the peopleÂ’s will, the Bolsheviks overthrew that countryÂ’s fledgling provisional government. That revolution unleashed a nightmare: a vicious civil war, the mass killing of clergy and religious believers, the slaughter of businessmen and landlords, and the building of concentration camps, 20 years before Hitler. In a single day, the Bolsheviks were known to boast, they killed more dissidents...