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. Although derived from the Latin word feodum or feudum, then in use, the term feudalism and the system it describes were not conceived of as a formal political system by the people living in the Middle Ages. In its classic definit
Causes of Earthquakes. Most earthquakes are causally related to compressional or tensional stresses built up at the margins of the huge moving lithospheric plates that make up the earth's surface (see lithosphere).
How did this massive earthquake really happen. This earthquake happened because of the faults and plate tectonics. The San Andreas Faults caused the earthquake in San Francisco. It caused the earthquake in San Francisco because it started over there and came to San Francisco.On it's way it went through few other cities and places.he tectonic plates also moved and that caused the earthquake. When the tectonic plates move the move apart or move together and that's what causes it. That is what caused the 1906 San Francisco earthquake.