Hellenistic sculpture represents one of the most important expressions of Hellenistic culture, and the final stage in the evolution of Ancient Greek sculpture. The definition of its chronological duration, as well as its characteristics and meaning, have been the subject of much discussion among art historians, and it seems that a consensus is far from being reached. The Hellenistic period is usually considered to comprise the interval between the death of Alexander the Great in 323 BC, and the conquest of Egypt by the Romans in 30 BC. Its generic characteristics are defined by eclecticism, secularism, and historicism, building on the heritage of classical Greek sculpture and assimilating Eastern influences. Among his original contributions to the Greek tradition of sculpture were the development of new techniques, the refinement of the representation of human anatomy and emotional expression, and a change in the goals and approaches to art, abandoning the generic for the specific. This translated into the abandonment of the classical idealism of an ethical and pedagogical character in exchange for an emphasis on everyday human aspects and the directing of production toward purely aesthetic and, occasionally, propagandistic ends. The attention paid to man and his inner life, his emotions, his common problems and longings, resulted in a realist style that tended to reinforce the dramatic, the prosaic, and the moving, and with this appeared the first individualized and verisimilitude portraits in Western art. At the same time, a great expansion of the subject matter occurred, with the inclusion of depictions of old age and childhood, of minor non-Olympian deities and secondary characters from Greek mythology, and of figures of the people in their activities. The taste for historicism and erudition that characterized the Hellenistic period was reflected in sculpture in such a way as to encourage the production of new works of a deliberately retrospective nature, and also of literal copies of ancient works, especially in view of the avid demand for famous classicist compositions by the large Roman consumer market.