Polish historian specialized in Eastern European history, professor at the University of Warsaw and Military Political Academy.
His scholarly achievements include nearly 300 works of various types, which mainly concern the history of Russia, the history of Slavdom and general history.
This period is the start to of the modern age and explains where we are today. This was the start of the overthrow of monarchy the creation of nation states (nationalism) creation of industry capitalism and socialism. 1789 to 1918 is where the modern world was established.