If, you are standing by a street, everybody else is waiting for the red light to turn green and stand still, will you choose to cross the street ignoring other people's attitudes towards you, or do the same thing as them? A most common result would be, you also standing there and waiting for the red light. This is a good daily live example showing that people's behavior is determined by force not of their own making. Furthermore, it's true that people do have things that they do under the influence of others and the social norms. According to basic social science theory, people is a social animal. Every person in the society has its own status, profession, statements and interests. And also, people has to interact with others in the society. In order to build up good relationship with various kinds of people, the social norms form spontaneously. When these norms formed, they, combines with other external factors, become a strong force that would effect people's behavior.Despite the direct form of influence, the external factors - like social norms, concrete circumstances, social interests and other people's views - have indirect ways of influence people's behavior. Through the function on personal values and views toward events, people may behave in their own consciousness but actually result from the external factors. That is, the force of not their own making. However, we should not neglect another important fact: human beings are self-decisive. That is to say, the behavior, not matter how much influenced by the internal and external factors, whose implement is determined by the subject itself. Every rational person have his or her own standard on what is right and what is wrong. This discrimination against the external factors plays significant roles in final determine the behavior. Imagining the following scenario: a student from a rural area has a strong desire to improve his living condition through education, even if the people around him all said that hard-working on schoolwork is not worth than doing small business, even if all the children of his same age playing all day long, even if his relatives want force him to drop from the school to help the family with everyday business, he would not surrender to them and try his best to conquer his dream. Admittedly, the external force, or the force of not his own making, is great enough to redirect his way of life, his behavior would not be determined by them.The force of not our own making may penetrate into our heart, change our attitude and change our behavior. However, people are not slaves of the external factors, as a group of animals who has their own idea and principles, people would always fight for his utmost benefits.