What are some pros and cons of a empire?

Which group did count von zinzendorf lead? Who were members of the tripple entente? What was Germany's reaction of world war 1? How has Democracy changed the history of Europe? How many years did it take for colombus reach san salvador? Why were Americans of the 1920s and 1930s bitter toward Americas world war 1 allies? Where was the conference that decided the boundaries of Europe in 1815? The Aryan population divided itself into classes that were not strictly defined People could move from one class to another Over time the system became more rigid and developed into the caste or s? Where blood diamond is located? What event the change from B.C to AD? What is the difference between an alliance and a treaty? When was peace declared after world war ii? By the end of the nineteenth century this country wich was unified in1865 had become a leading world industrialnation? What was one of the most important causes of the Russian Revolution of 1917? Are examples of actions that affect the rest of the worl in some way? How can queen elizabeth not have power when she is the head of state? What was the death machine in the French Revolution? Which area was NOT at one time governed by the Hapsburgs? Why did David Lloyd George take part In world war 1? Did cogress vote to go to war against the allies?