In any case, the findings rests mostly upon Bangladesh, Indonesia and Nigeria. One commentator in the Wall Street Journal, for example, mixed Adam Smith, Thomas Paine, the French Revolution and the American Revolution as part of the same worldwide movement toward democracy. The other traced to an American revolution that put individuals and private and traditional local institutions first, and only required a limited government that allowed them freedom, if they did not harm others. If the later democracies followed this lead at least to the extent of dividing power, they could follow the American way. The ones that did so are successful today.
Predictions are hazardous.
As Joshua Muravichik notes, the most common prediction for the 20th Century in the 1900 was for the end of warfare. Instead, it was the most bloody century in history, by far. Democracy in Russia today did not prevent the invasion of Chechnya. The examples are endless. Considering that more people were killed by their own government in the last century than by war, building freedom is the better remedy, especially the Founders' central mechanisms of checking and balancing power and laws supporting private and local institutions.