According to communists, what is the key to improving human society?

increasing wages

enforcing mandatory charity

eliminating private property

changing the way money works

Among the options given below the answer is option C.

eliminating private property.

Explanation: According to the communist perception the base of the communist society is the common ownership of all assets and access to the all products equally regardless the class.

The key to improve human society is by eliminating the private property.On the communist system government is the owner of all properties and has responsibility to distribute the access the right of the property to the people. Because the communists believe that privatization of the property will lead the society to the imbalance of the property.As a result the difference of rich and poor will be more visible. So human society will not be improved.

So as a main key to improve the human society, the elimination of the private property is certain.

whose power in the senate is equal to the power of the speaker of the house?

social contract theory basically says that all individuals are born equal, and provided a god given right to consent to be governed. american government is based of this

thomas hobbes and john locke said that we are selfish, individualistic, and constantly at war with each other, therefore we need to be controlled. 

government is defined as the legitimate use of force to control human behavior within territorial boundaries, here comes in hobbes and locke.

hobbes takes the part about controlling human behavior. while locke takes the part of legitimate use of force, since force is not legitimate unless there is consent of the people. 

there are basically 3 goals of the government: 1) maintain order by protecting life and property. 2) providing public goods, those which are typically not provided by the public sector, such as roads and education. 3) promote equality be it political, opportunist or outcome equality.