In the 19th century there were aristocracy and serfs.
Nobles and czars.
Russia and China
russia
The new elite, the middle classes, and the working classes
three.. :) ..
the major classes of materials
Lymphomas can be divided into two main types: Hodgkin's lymphoma or Hodgkin's disease, and non-Hodgkin's lymphomas.
Russia's major transportation is railroad's.
Emperor, Nobility and Priests were the major classes of Aztec society.
Lenin made Russia a major power
The three major classes of cnidarians are hydrozoans, jellyfish, and sea anemones and corals.
Rivalry with Russia coming to a pinnacle in the Great Northern War