Consider the following statements about the key works of Leopold von Ranke and their focus:

1. The "History of the Latin and German Peoples" highlighted the unity and development of Latin and Germanic nations through shared historical experiences.
2. "The Nine Books of Prussian History"  glorified Prussia's rise to power, reflecting Ranke’s patriotic enthusiasm.
3. Ranke's "Universal History" excluded the history of Eastern peoples from its scope.
4. "The Origins of the Wars of the Revolution" attributed the start of the French Revolution primarily to the interference of European powers.

Which of the above statements are correct?