A government that is ran by One person?

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

What is the framework that citizens create so there is order in society?

Brainliesttt !me : ) why were the eastern european countries attempting to break free of the soviet union?