In the master-slave relationship, with this union, the master can not exist without the slave. The slave is there to assist the master with the maintaining of the master's wants and needs. In the classroom setting the teacher is the slave because he or she has the knowledge that is needed by the students. The students would be the master because the teacher is upholding the desires and wishes of the students by teaching them the knowledge they have. According to Aristotle The Politics, Book I Chapter 2, "The naturally ruling and ruled, on the account of preservation. For that which can see with the thought is naturally ruling and naturally mastering elements while that which can do with the body is naturally ruled and slave." This is one of the common relationships that are known in the household. The household is the partnership established by nature for the needs of daily life. A group of households makes up a village, and a group of villages makes up a city.
Now that we have seen that the city is made up of households, I would like to discuss that management of the household. What makes up the household relates to the people in the household. A complete household consist of slaves and freemen; who are the master and slave, the husband and wife, and the parent and child. The leadership of the master over the slave is different from nature, and the difference between the slave and freeman only exists by law. It is considered just, but the slave and freeman don't exists by nature and being an impediment with nature is consequently unjust.
What is property? According to the Merriam