The collective anonymous has mounted a wide range of disruptive events that have often shut down industries and parts of government. a sociologist would be unlikely to call this effort a revolution because the collective:

The reason why sociologists wouldn't consider Anonymous' actions as revolutionary, is because their aim have never been to cause social, economical or political changes. They are not a closed group of people fighting for the same ideas, they may have similar principles, but this doesn't mean that they are organized. A revolution is made by people who agree the same, need the same and want to cause an abrupt change in the government.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.