The conflict theories of social change: There are three main general theories for social change. These are:

1. Evolution Theory.

2. Cyclical Theory. and

3. Functional Theory. 

The last, but not the least is the fourth one. This theory is called the conflict theory. Here we will explain in about 125 words only the conflict theory (as derived by the question).

Conflict Theory: According to this theory, every pattern of action, belief and interaction tends to generate an opposing reaction. Thus this theory highlights the forces producing instability using social disorganization. It sees unequal distribution of power and authority as the fundamental source of conflict. The groups with power want to preserve the status quo while other groups desire to change it. This conflict between these groups leads to various changes in the structure of society although the nature and depth of conflict and resultant change depends on numerous factors. Every social structure begins as a "thesis" of its current state of existence but its own internal contradictions or antagonisms prompt a challenge to its structure. This challenge is called the "antithesis". This conflict serolves itself into a "synthesis" of a wholly new social structure carrying some elements from both "thesis" and the "antithesis". However, this theory does not explain social stability in societies.

Fig: The Mechanism of Socialization