ABSTRACT
This chapter presents some facts regarding the constitutional foundations of the individual that includes the basic, the acquired motives, the feelings and the emotions. The major factors determining human behavior may be classified into three categories: those structures and functions which have their bases in the species; those that emerge or come into operation through growth or maturation; and those which people acquire through the learning. The basic biological impulses get overlaid with social and cultural effects. That is, the original imperatives become changed into insistent social-psychological and cultural requirements. The interactional effects are everywhere evident in the development of mans feelings and emotions, since nearly the entire fundamental training takes place within the framework of the social act. Laughter is clearly related to smiling and pleasant affective states. The species origin of laughter is unknown, and it is said that man is the only animal which laughs.
