Answer:
involment in ww1 bad living conditions failure of the monarchy
Explanation:
Lenin promised the end of these things and people followed him hope this helps god bless
They didn't want them to control the black sea
From the collapse of ancient Rome to the fall of the Mayan empire, evidence from archaeology suggests that five factors have almost invariably been involved in the loss of civilizations: uncontrollable population movements; new epidemic diseases; failing states leading to increased warfare; collapse of trade routes