All of these are the causes that led to the Russian Revolution. The Russian Revolution consists of two revolutions actually and those are the February Revolution and the October Revolution. The Russian Revolution led to the end of Tsarists autocracy and led to the rise of the Soviet Union.
A confederate system sits at the other extreme in terms of centralization. A confederacy is a loose relationship among a number of smaller political units. The vast majority of political power rests with the local governments; the central federal government has very little power. Local governments have a great deal of freedom to act as they wish, but this freedom often leads to conflicts between states and the federal government. In some cases, a confederacy is little more than an alliance between independent states.
Huh ? Is that a question ?