I believe the answer is: Society in general.
For example, murder is considered as a criminal behavior.
Even though when a person killing another person do not directly cause damage to the whole society, the killer's existence become a threat that diminish the quality of life in that society.
Long sections of the ancient walls have been preserved, however, and archaeology remains an essential element of modern city-planning in Rome. Ancient marble columns and ruins rising beside modern apartments and offices, noisy boulevards, and luxurious villas and gardens characterize the modern city of Rome.
I believe the answer is: Fear.
Hobbes believed that people would naturally rejects every effort to restrict their full personal freedom to be able to do whatever they want.
The very nature of 'law' itself is to restrict this full freedom in order to maintain a certain level of harmony in a society. Because of this, the people wouldn't follow the law willingly unless there is a punishment for it.
Answer:
Happiness. Not momentary happiness, but true satisfaction at the end of your life.
Explanation: