The theory of the four causes elaborated, searching to understand the essence of each thing; still, searching to discover the truth, the structure of the logical silogism elaborated. Its scientific logic and its studies of biology (potencializados for the conquests of its I cry, Alexander, the Great one), are basic for the development of discipline them to both, that it occurred later (Bergman, 2004). He was the founder of the 2 secondary school, in Atenas, where it taught to its theories of philosophy the students (Figueira, 2005). 4.PERODO HELLENISTIC This period extends of the end of century III C until century VI dC. With the conquests of Alexander, the Great one, from the Macedonian, the culture in the old world suffered many transformations (Figueira, 2005). Later, the conquest of Greece for the Romans intensified the destruction politics of the Greeks and the decay of its concerns politics. The helenismo, for the philosophy, represents a continuity of the schools platonic and aristotelian, and searched to explain the nature and the man, and its relations with the deities (Cabral, 2006). The conquests of the foreigners had caused the decay of the patriotism, placing as main question the private life, the problem of the happiness and the personal salvation.
Thus, the philosophy adopted a position of practical moral, searching to guide the men in its behavior. They are the five main schools of this period: estoicismo, epicurismo, skepticism, ecleticism and cynicism (Cabral, 2006). 4,1 ESTOICISMO the name estoicismo drift of? sto? , that it means porch, alluding to that they were to the doors of the city nailing the doctrine. Unbelievers of you polish and of the influence of deuses, the esticos were individualistic and turned it its subjectivity. For the practical one of virtues had tried to reach the wisdom. Living the virtues in one practical rational, believed that they would obtain? ataraxia? , that it would be the absence of sensations and disturbances.