Same right of living and freedom

Leviticus 25:19-55
Anyone who sells a house in a walled city retains the right of redemption a full year after its sale. During that time the seller may redeem it. If it is not redeemed before a full year has passed, the house in the walled city shall belong permanently to the buyer and the buyer’s descendants. It is not to be returned in the Jubilee.
But houses in villages without walls around them are to be considered as belonging to the open country. They can be redeemed, and they are to be returned in the Jubilee.
Properties of Levites always may redeem his possess, But the pastureland belonging to their towns must not be sold.
The rules of Israelites to be a slave, must be redeemed by his relatives or be released in Jubilee. 
For the Israelites belong to God as servants.
Why?
It is a time when those who have fallen on bad times have their freedom and property restored. Jubilee, the year of restoration, serves a dual purpose. It reminds the people that the land belongs to God; and it prevents the wealthy from amassing land.
The land is mine, and you come to it as aliens and tenants of mine. 
How?
Respect each man in the world, they have the same right of living and freedom.